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Ruby Falls
One body. Five suspects. Total darkness.
A tense, claustrophobic historical mystery set almost entirely underground at the onset of the Great Depression about the discovery of a 150-foot waterfall in the middle of a mountain, the unthinkable crime that happens in its caves, and a woman who’s never felt more alive.
In 1928, a Chattanooga man disappears down a hole in the ground and discovers a 150-foot waterfall in the middle of a mountain that he names after his Ruby Falls. Within months, visitors can buy tickets to see the falls for themselves. Ada Smith has been sneaking into the caves at night, entranced by the natural wonders around her and the freedom granted by this new underground world.
But it’s tough timing for a natural wonder. As the country flounders in the Great Depression, a shrewd public relations ploy seems like the only way to save Ruby Falls. A famous mind reader and mystic agrees to launch himself into the Ruby Falls caverns where he will attempt to locate a hidden hatpin using only his psychic abilities. He'll be joined by five his manager, his wife, a guide, a Chattanooga businessman, and a reporter from the Chicago Times. But they’re not alone in the caverns. Ada and another guide, Quinton, have been asked to follow the mind reader’s party at a distance, staying out of sight. They are a safety net, in case of a broken leg or busted flashlights.
One of them will be dead before the end of the day.
Faced with a corpse and the stark reality that one of the people in her midst is a killer, Ada needs to get everyone—the murderer and the innocents—back aboveground before their light runs out.
Ruby Falls is both a unique twist on the locked-room mystery and an exploration of loss and what it means to start over. It’s a heart-racing story of survival and a testament to the threads that bind strangers together. Set against the true story of the discovery of Ruby Falls, the novel also draws on the memoirs of Katie Stabler, a female guide at Wind Caves in South Dakota.
A tense, claustrophobic historical mystery set almost entirely underground at the onset of the Great Depression about the discovery of a 150-foot waterfall in the middle of a mountain, the unthinkable crime that happens in its caves, and a woman who’s never felt more alive.
In 1928, a Chattanooga man disappears down a hole in the ground and discovers a 150-foot waterfall in the middle of a mountain that he names after his Ruby Falls. Within months, visitors can buy tickets to see the falls for themselves. Ada Smith has been sneaking into the caves at night, entranced by the natural wonders around her and the freedom granted by this new underground world.
But it’s tough timing for a natural wonder. As the country flounders in the Great Depression, a shrewd public relations ploy seems like the only way to save Ruby Falls. A famous mind reader and mystic agrees to launch himself into the Ruby Falls caverns where he will attempt to locate a hidden hatpin using only his psychic abilities. He'll be joined by five his manager, his wife, a guide, a Chattanooga businessman, and a reporter from the Chicago Times. But they’re not alone in the caverns. Ada and another guide, Quinton, have been asked to follow the mind reader’s party at a distance, staying out of sight. They are a safety net, in case of a broken leg or busted flashlights.
One of them will be dead before the end of the day.
Faced with a corpse and the stark reality that one of the people in her midst is a killer, Ada needs to get everyone—the murderer and the innocents—back aboveground before their light runs out.
Ruby Falls is both a unique twist on the locked-room mystery and an exploration of loss and what it means to start over. It’s a heart-racing story of survival and a testament to the threads that bind strangers together. Set against the true story of the discovery of Ruby Falls, the novel also draws on the memoirs of Katie Stabler, a female guide at Wind Caves in South Dakota.
336 pages, Hardcover
First published March 3, 2026
61 people are currently reading
10453 people want to read
About the author
Gin Phillips
7 books566 followersGin Phillips has published seven novels, and her work has been sold in 29 countries. Her newest novel, RUBY FALLS, will be published by Atlantic Crime on March 3, 2026.
Gin’s debut novel, THE WELL AND THE MINE, won the 2009 Barnes & Noble Discover Award. Her novel, FIERCE KINGDOM, was named one of the Best Crime Novels of 2017 by the New York Times Book Review. It was also named one of the best books of the year by NPR, Publishers Weekly, Amazon, and Kirkus Reviews. Gin’s novels also have been named as selections for Indie Next, Book of the Month, and the Junior Library Guild.
Born in Montgomery, Al., Gin graduated from Birmingham-Southern College with a degree in political journalism. After time spent in Ireland, New York, and Washington, D.C., she currently lives with her family (including a wonderfully weird golden mountain doodle) in Birmingham, Al.
Gin’s debut novel, THE WELL AND THE MINE, won the 2009 Barnes & Noble Discover Award. Her novel, FIERCE KINGDOM, was named one of the Best Crime Novels of 2017 by the New York Times Book Review. It was also named one of the best books of the year by NPR, Publishers Weekly, Amazon, and Kirkus Reviews. Gin’s novels also have been named as selections for Indie Next, Book of the Month, and the Junior Library Guild.
Born in Montgomery, Al., Gin graduated from Birmingham-Southern College with a degree in political journalism. After time spent in Ireland, New York, and Washington, D.C., she currently lives with her family (including a wonderfully weird golden mountain doodle) in Birmingham, Al.
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Review of advance copy received from Netgalley
Ruby Falls is a 150 foot waterfall located in the middle of a mountain. It was discovered by Leo Lambert in 1928 and he named it after his wife, Ruby. It was opened up for tours via an elevator at the start of the Great Depression. Ruby Falls by Gin Phillips is inspired by that story and adds a locked room mystery! To drum up business, Leo arranges for a mind reader to come and find hatpin hidden somewhere in the caves. He's joined by 5 others, including his wife, manager, newspaper man, and two people working for the Falls. Ada who is Ruby's friend, has been secretly exploring the caves. She, along with another guide Quinton, are tasked to secretly follow the group, to make sure they get out safely. It becomes a real situation when one of the group is murdered.
It's historical fiction, a mystery, and a bit of romance all in one. I loved everything about it. I had a feeling before I started reading. I mean, look at the cover! But I wasn't prepared for how the setting and characters would grip me. I'm claustrophobic and would never explore a cave, but I enjoyed my time underground with main character Ada and the rest of the group.
Things start out on the slower side, giving you time to get to know Ada. I immediately identified with her desire to try something that she wanted and that she wasn't expected to do. Her love for the caves grew and that made me enjoy the setting. I could see everything in my mind and it's perfect for the mystery that unfolds.
The characters are unique. We get a few chapters from some of them. The rest are from Ada's point of view. The dialogue is fantastic. I loved watching the story and all the scenes unfold. Switching between the tour group and Ada with Quinton was a great way to build tension.
Any one of the group could have been the killer. You'll likely keep changing your mind until the end. Waiting to see if they make it out adds a survival element that is just perfect. I really didn't want the book to end!
You have to read this! Thank you to Grove Atlantic and Netgalley for the chance to read! All opinions are my own.
It's historical fiction, a mystery, and a bit of romance all in one. I loved everything about it. I had a feeling before I started reading. I mean, look at the cover! But I wasn't prepared for how the setting and characters would grip me. I'm claustrophobic and would never explore a cave, but I enjoyed my time underground with main character Ada and the rest of the group.
Things start out on the slower side, giving you time to get to know Ada. I immediately identified with her desire to try something that she wanted and that she wasn't expected to do. Her love for the caves grew and that made me enjoy the setting. I could see everything in my mind and it's perfect for the mystery that unfolds.
The characters are unique. We get a few chapters from some of them. The rest are from Ada's point of view. The dialogue is fantastic. I loved watching the story and all the scenes unfold. Switching between the tour group and Ada with Quinton was a great way to build tension.
Any one of the group could have been the killer. You'll likely keep changing your mind until the end. Waiting to see if they make it out adds a survival element that is just perfect. I really didn't want the book to end!
You have to read this! Thank you to Grove Atlantic and Netgalley for the chance to read! All opinions are my own.
March 3, 2026
…every person in the world is more astonishing than this waterfall. She sees that. They are, each one of them, a mountain with a thousand rooms inside, some unmappable, and they are not all pleasant, but, God, what creations they are.
In Chattanooga, Tennessee, in 1928, a man named Leo Lambert was exploring an unknown section of Lookout Mountain when he discovered a 150-foot waterfall, deep underground. He named it Ruby Falls in honor of his wife and decided to open the cave for tours. He built a castle on the mountain with limestone from the excavation site, where people could come for dinner and dancing, and hoped that this revenue would sustain his family through the Great Depression. This is all real history. And it’s where Ruby Falls begins.
In Gin Phillips’ fictionalized account of that time, we mostly follow Ruby’s best friend, Ada, who has secretly been exploring Lookout Mountain’s caves and passageways on her own at night. Soon her secret spelunking sessions are discovered by one of the guides, Quinton, who recommends her to Leo to help with a mission: Leo has invited a famous mind reader and his acquaintances to Ruby Falls, where the mind reader will attempt to find a hat pin hidden in the cave system. Quinton and Ada will follow the group at a distance as a safety net in case something goes wrong. But no one anticipated that someone would be murdered, deep in the darkness of the caves.
Set almost entirely underground, with only the light of headlamps to guide the way, Ruby Falls is so claustrophobic and full of tension. The concept of a “locked cave mystery,” so to speak, is so original, and Phillips utilizes it so well. But for me, the whodunnit wasn’t the most compelling part of this story: It was the rich characterizations and the immersive hundred-year-old atmosphere that kept me riveted.
I loved that Phillips drew on the real history of Ruby Falls to craft this story, which is not only a mystery, but also a tale of adventure and survival with elements of romance and historical fiction and themes of women’s rights and empowerment. It’s so well-executed, moving among Ada’s point of view and those of the other characters to reveal their secrets and motives, adding to the suspense. The Great Depression looms in the background as both a threat and an opportunity, depending on which character we’re with.
I honestly think I would’ve enjoyed Ruby Falls just as much even if there was no murder mystery aspect. It’s such a fascinating book even outside of that element, from its plotting and pacing to its vivid atmosphere to its complex characters, to the way it draws its inspiration from, and places its characters directly inside, real American history. It’s a book about unexplored caverns, yes - but it’s also a book about the dark, unmapped parts of the human soul. Thank you to Atlantic Crime for the early reading opportunity.
November 13, 2025
Ruby Falls starts off as a strong historical fiction/thriller. We have a interesting time period and very unique setting and a very strong premise. The atmosphere is the best part of this read. It is haunting, suffocating with elements of sensory deprivation slowly eating away at the mental stability of the characters. Eleanore is an unreliable narrator but that is what makes her most intriguing. She is fearless yet anxious and clearly coming apart inside. Though well written the story begins to slow and drag a bit for me. Not so much that I lost interest completely but enough for me to glance ahead and watch chapter length, if that makes sense. The ending almost seemed written by a different author which was unexpected.
Overall it was a well written story that was good not great. If you read books for atmosphere though, this will be the read for you.
Overall it was a well written story that was good not great. If you read books for atmosphere though, this will be the read for you.
September 29, 2025
Thanks to Grove Atlantic and NetGalley for the e-ARC.
Living in north Georgia, I found the premise and setting interesting, but the story and characters did not hold my interest. Fans of historical fiction/romance/mysteries may enjoy this one.
Living in north Georgia, I found the premise and setting interesting, but the story and characters did not hold my interest. Fans of historical fiction/romance/mysteries may enjoy this one.
March 9, 2026
Gin Phillips is back with a great new story - Ruby Falls - from Atlantic Crime.
“Leo discovers a waterfall deep underground in a cave system. He names them after his wife and builds access to make it a tourist attraction. But it’s the Great Depression and many don’t have money to spare. A publicity stunt brings a mind-reader who’s agreed to go into the cave to find a hat pin hidden by two men usually only their thoughts to guide him. He goes in with the two men, his wife and a reporter. Ada and Quinton, two people with intimate knowledge of the caverns and passages, also follow as backup in case of emergency.
One person will not make it out alive…”
This story is set during the Depression, so no technology - no one is calling on a phone for help. Phillips uses the dark and the passage of time to drive the tension. Will they run out of light and water and supplies? Will they be enveloped in total darkness with a killer?
I love the voice of the female characters. I can hear my Nanny and Mom and aunts clearly in these characters. Nanny said “directly” a lot and they all said “Well” with multiple syllables all the time. It’s probably not a coincidence that my mom grew up in Birmingham where Gin lives.
Gin has written these wonderful women that wanted more that what people expected of them in the 30’s. You will love Ada.
Wild ending - Phillips doesn’t give it away.
This is my 2nd killer-cave book this year. Even though this is a tourist attraction that’s still open, caves are just not for me.
Great story from Gin Phillips. Read it on the beach and not in a cave.
“Leo discovers a waterfall deep underground in a cave system. He names them after his wife and builds access to make it a tourist attraction. But it’s the Great Depression and many don’t have money to spare. A publicity stunt brings a mind-reader who’s agreed to go into the cave to find a hat pin hidden by two men usually only their thoughts to guide him. He goes in with the two men, his wife and a reporter. Ada and Quinton, two people with intimate knowledge of the caverns and passages, also follow as backup in case of emergency.
One person will not make it out alive…”
This story is set during the Depression, so no technology - no one is calling on a phone for help. Phillips uses the dark and the passage of time to drive the tension. Will they run out of light and water and supplies? Will they be enveloped in total darkness with a killer?
I love the voice of the female characters. I can hear my Nanny and Mom and aunts clearly in these characters. Nanny said “directly” a lot and they all said “Well” with multiple syllables all the time. It’s probably not a coincidence that my mom grew up in Birmingham where Gin lives.
Gin has written these wonderful women that wanted more that what people expected of them in the 30’s. You will love Ada.
Wild ending - Phillips doesn’t give it away.
This is my 2nd killer-cave book this year. Even though this is a tourist attraction that’s still open, caves are just not for me.
Great story from Gin Phillips. Read it on the beach and not in a cave.
March 4, 2026
I enjoy historical mystery but this one was very slow-paced. It had an unusual setting - underground caves in which there is a waterfall - and an interesting concept of a psychic going in the caves to prove he can find a hidden item using his psychic abilities alone. He’s accompanied by a small group of observers and all goes well until someone is murdered.
The story started off well with the friendship of two women, Ada and Ruth, and I thought that would be a central element of the novel but it wasn’t. The middle section slowed down and my interest started to wane. It never really recovered.
Unfortunately this one wasn’t for me but fans of slow-burn reads may like it better.
Thanks to the publisher for this complimentary digital copy. All opinions are my own.
The story started off well with the friendship of two women, Ada and Ruth, and I thought that would be a central element of the novel but it wasn’t. The middle section slowed down and my interest started to wane. It never really recovered.
Unfortunately this one wasn’t for me but fans of slow-burn reads may like it better.
Thanks to the publisher for this complimentary digital copy. All opinions are my own.
September 28, 2025
In 1928, Ruby Lambert’s husband Leo discovers a massive waterfall inside of Lookout Mountain near Chattanooga, Tennessee. He names it Ruby Falls after his beloved wife.
This amazing discovery attracts visitors from all over the world.
Meanwhile, Ada Smith has been exploring the caves of Lookout Mountain alone at night.
Unfortunately, The Great Depression hits Tennessee hard. Leo and Ruby are struggling to keep their attraction open to the public.
Along comes famous mind-reader Jeremiah Hagathorn. He proposes a publicity stunt that Leo cannot resist.
Someone will hide a hat pin inside Lookout Mountain, and Jeremiah will find it using only his psychic ability.
Jeremiah is accompanied by his wife and three others, including a reporter. Ada and fellow spelunker Quinton are secretly hired to follow the crew in case of an emergency.
A simple publicity stunt turns dangerous and deadly quickly.
Ruby Falls is a unique thriller that takes place underground in darkness. The story also becomes a tale of survival!
Thank you Atlantic Crime Publishers and NetGalley for sending me this ARC.
This amazing discovery attracts visitors from all over the world.
Meanwhile, Ada Smith has been exploring the caves of Lookout Mountain alone at night.
Unfortunately, The Great Depression hits Tennessee hard. Leo and Ruby are struggling to keep their attraction open to the public.
Along comes famous mind-reader Jeremiah Hagathorn. He proposes a publicity stunt that Leo cannot resist.
Someone will hide a hat pin inside Lookout Mountain, and Jeremiah will find it using only his psychic ability.
Jeremiah is accompanied by his wife and three others, including a reporter. Ada and fellow spelunker Quinton are secretly hired to follow the crew in case of an emergency.
A simple publicity stunt turns dangerous and deadly quickly.
Ruby Falls is a unique thriller that takes place underground in darkness. The story also becomes a tale of survival!
Thank you Atlantic Crime Publishers and NetGalley for sending me this ARC.
March 6, 2026
3.5 rounded up. I really enjoyed the skeleton of the story, but I think it sagged too much in the middle to be a full four star.
March 17, 2026
It’s been forever since I stayed up late to finish a book! This one was great!
December 30, 2025
Thank you to netgalley and the publisher for the arc of this. I was very interested in the idea of a murder mystery inside of the caves of Ruby Falls. I went to Ruby Falls earlier this year, and the setting really was similar to the real place. The setting and how the caves were brought to life were really good. I wished this story had more suspense. There was so much potential for a great, high stakes mystery but this read more like litfic with mystery. That’s not really my thing. I think if you prefer cozy mysteries or a lighter mystery, this is more geared toward you.
All opinions are my own
All opinions are my own
March 22, 2026
In 2017, I read Gin Phillips' novel, FIERCE KINGDOM, which was about a woman and her child trying to survive in a zoo during an active shooter situation. I primarily listened to the audiobook while I was training for a long-distance race. Maybe the fact that I was doing my runs in the predawn hours by myself on the edge of town escalated the tension, but it's certain that Phillips' unique premise and suspenseful writing amped up my heart rate even more than it would have been otherwise.
When I learned that RUBY FALLS is set almost entirely underground, I knew I was in for more adrenaline-fueled reading this time around as I am extremely claustrophobic. Despite sharing that page-turning momentum, it is indeed a very different novel from FIERCE KINGDOM. For one thing, it's a mystery set during the Great Depression. And although the specific premise is not based in historical fact, the setting is very much a real place: a 63-foot waterfall located inside a cave near Chattanooga, Tennessee.
The book opens with a lightly fictionalized account of the waterfall's accidental discovery in 1928 during an excavation by Leo Lambert, who named the falls after his wife. In Phillips' telling, Ruby's good friend, Ada Smith, accompanies a small group on the first guided visit to see the falls. She's fascinated not only by the falls themselves but by the wonders of underground exploration, a hobby she pursues more frequently after the death of her husband.
Leo's dreams of striking it rich by turning the falls into a tourist attraction fall on hard times. It's not easy to launch a major business venture during a global economic depression. So in 1931, he hatches a new plan for a much-needed boost in buzz. He hires a famous mind reader, Professor Jeremiah Hagathorn, to participate in a publicity stunt. Two neutral participants (a local businessman and a cave guide) will hide a ladies' hat pin somewhere in the cave. Then, the next day, the mystic will use his psychic powers to find it somewhere in the extensive cave system surrounding the falls. Joining Hagathorn, along with the guide and the businessman, will be Hagathorn's wife and his manager. Just to ensure the event captures the headlines, Lambert has enlisted a Chicago newspaperman to accompany the group and report on the story.
Unknown to anyone else, however, two additional spelunkers will be tagging along, just out of sight: Ada and a man named Quinton, who accidentally discovered Ada’s pastime. They've agreed to keep their presence a secret and just ensure the group's safety. But when one member of the party turns up dead, they have no choice but to reveal themselves. And then the lanterns start to run out of fuel.
Set largely over the course of a single day and almost entirely within the increasingly oppressive and dangerous cave system, RUBY FALLS is a propulsive read. Ada is the central character, but Phillips offers insights into almost everyone else's backstories and motivations…and reveals the many secrets and lies they carry. This isn't just an exciting mystery, though. It also sheds light (so to speak) on the position of women at this time in history, as well as Ada's mixture of regret and excitement at being childless and able to pursue new kinds of passions.
Whether readers listen to RUBY FALLS in the dark or read it with all the lights on, they'll want to carve out some time to explore this rewarding historical mystery.
Reviewed by Norah Piehl
When I learned that RUBY FALLS is set almost entirely underground, I knew I was in for more adrenaline-fueled reading this time around as I am extremely claustrophobic. Despite sharing that page-turning momentum, it is indeed a very different novel from FIERCE KINGDOM. For one thing, it's a mystery set during the Great Depression. And although the specific premise is not based in historical fact, the setting is very much a real place: a 63-foot waterfall located inside a cave near Chattanooga, Tennessee.
The book opens with a lightly fictionalized account of the waterfall's accidental discovery in 1928 during an excavation by Leo Lambert, who named the falls after his wife. In Phillips' telling, Ruby's good friend, Ada Smith, accompanies a small group on the first guided visit to see the falls. She's fascinated not only by the falls themselves but by the wonders of underground exploration, a hobby she pursues more frequently after the death of her husband.
Leo's dreams of striking it rich by turning the falls into a tourist attraction fall on hard times. It's not easy to launch a major business venture during a global economic depression. So in 1931, he hatches a new plan for a much-needed boost in buzz. He hires a famous mind reader, Professor Jeremiah Hagathorn, to participate in a publicity stunt. Two neutral participants (a local businessman and a cave guide) will hide a ladies' hat pin somewhere in the cave. Then, the next day, the mystic will use his psychic powers to find it somewhere in the extensive cave system surrounding the falls. Joining Hagathorn, along with the guide and the businessman, will be Hagathorn's wife and his manager. Just to ensure the event captures the headlines, Lambert has enlisted a Chicago newspaperman to accompany the group and report on the story.
Unknown to anyone else, however, two additional spelunkers will be tagging along, just out of sight: Ada and a man named Quinton, who accidentally discovered Ada’s pastime. They've agreed to keep their presence a secret and just ensure the group's safety. But when one member of the party turns up dead, they have no choice but to reveal themselves. And then the lanterns start to run out of fuel.
Set largely over the course of a single day and almost entirely within the increasingly oppressive and dangerous cave system, RUBY FALLS is a propulsive read. Ada is the central character, but Phillips offers insights into almost everyone else's backstories and motivations…and reveals the many secrets and lies they carry. This isn't just an exciting mystery, though. It also sheds light (so to speak) on the position of women at this time in history, as well as Ada's mixture of regret and excitement at being childless and able to pursue new kinds of passions.
Whether readers listen to RUBY FALLS in the dark or read it with all the lights on, they'll want to carve out some time to explore this rewarding historical mystery.
Reviewed by Norah Piehl
March 22, 2026
In 2017, I read Gin Phillips' novel, FIERCE KINGDOM, which was about a woman and her child trying to survive in a zoo during an active shooter situation. I primarily listened to the audiobook while I was training for a long-distance race. Maybe the fact that I was doing my runs in the predawn hours by myself on the edge of town escalated the tension, but it's certain that Phillips' unique premise and suspenseful writing amped up my heart rate even more than it would have been otherwise.
When I learned that RUBY FALLS is set almost entirely underground, I knew I was in for more adrenaline-fueled reading this time around as I am extremely claustrophobic. Despite sharing that page-turning momentum, it is indeed a very different novel from FIERCE KINGDOM. For one thing, it's a mystery set during the Great Depression. And although the specific premise is not based in historical fact, the setting is very much a real place: a 63-foot waterfall located inside a cave near Chattanooga, Tennessee.
The book opens with a lightly fictionalized account of the waterfall's accidental discovery in 1928 during an excavation by Leo Lambert, who named the falls after his wife. In Phillips' telling, Ruby's good friend, Ada Smith, accompanies a small group on the first guided visit to see the falls. She's fascinated not only by the falls themselves but by the wonders of underground exploration, a hobby she pursues more frequently after the death of her husband.
Leo's dreams of striking it rich by turning the falls into a tourist attraction fall on hard times. It's not easy to launch a major business venture during a global economic depression. So in 1931, he hatches a new plan for a much-needed boost in buzz. He hires a famous mind reader, Professor Jeremiah Hagathorn, to participate in a publicity stunt. Two neutral participants (a local businessman and a cave guide) will hide a ladies' hat pin somewhere in the cave. Then, the next day, the mystic will use his psychic powers to find it somewhere in the extensive cave system surrounding the falls. Joining Hagathorn, along with the guide and the businessman, will be Hagathorn's wife and his manager. Just to ensure the event captures the headlines, Lambert has enlisted a Chicago newspaperman to accompany the group and report on the story.
Unknown to anyone else, however, two additional spelunkers will be tagging along, just out of sight: Ada and a man named Quinton, who accidentally discovered Ada’s pastime. They've agreed to keep their presence a secret and just ensure the group's safety. But when one member of the party turns up dead, they have no choice but to reveal themselves. And then the lanterns start to run out of fuel.
Set largely over the course of a single day and almost entirely within the increasingly oppressive and dangerous cave system, RUBY FALLS is a propulsive read. Ada is the central character, but Phillips offers insights into almost everyone else's backstories and motivations…and reveals the many secrets and lies they carry. This isn't just an exciting mystery, though. It also sheds light (so to speak) on the position of women at this time in history, as well as Ada's mixture of regret and excitement at being childless and able to pursue new kinds of passions.
Whether readers listen to RUBY FALLS in the dark or read it with all the lights on, they'll want to carve out some time to explore this rewarding historical mystery.
Reviewed by Norah Piehl
When I learned that RUBY FALLS is set almost entirely underground, I knew I was in for more adrenaline-fueled reading this time around as I am extremely claustrophobic. Despite sharing that page-turning momentum, it is indeed a very different novel from FIERCE KINGDOM. For one thing, it's a mystery set during the Great Depression. And although the specific premise is not based in historical fact, the setting is very much a real place: a 63-foot waterfall located inside a cave near Chattanooga, Tennessee.
The book opens with a lightly fictionalized account of the waterfall's accidental discovery in 1928 during an excavation by Leo Lambert, who named the falls after his wife. In Phillips' telling, Ruby's good friend, Ada Smith, accompanies a small group on the first guided visit to see the falls. She's fascinated not only by the falls themselves but by the wonders of underground exploration, a hobby she pursues more frequently after the death of her husband.
Leo's dreams of striking it rich by turning the falls into a tourist attraction fall on hard times. It's not easy to launch a major business venture during a global economic depression. So in 1931, he hatches a new plan for a much-needed boost in buzz. He hires a famous mind reader, Professor Jeremiah Hagathorn, to participate in a publicity stunt. Two neutral participants (a local businessman and a cave guide) will hide a ladies' hat pin somewhere in the cave. Then, the next day, the mystic will use his psychic powers to find it somewhere in the extensive cave system surrounding the falls. Joining Hagathorn, along with the guide and the businessman, will be Hagathorn's wife and his manager. Just to ensure the event captures the headlines, Lambert has enlisted a Chicago newspaperman to accompany the group and report on the story.
Unknown to anyone else, however, two additional spelunkers will be tagging along, just out of sight: Ada and a man named Quinton, who accidentally discovered Ada’s pastime. They've agreed to keep their presence a secret and just ensure the group's safety. But when one member of the party turns up dead, they have no choice but to reveal themselves. And then the lanterns start to run out of fuel.
Set largely over the course of a single day and almost entirely within the increasingly oppressive and dangerous cave system, RUBY FALLS is a propulsive read. Ada is the central character, but Phillips offers insights into almost everyone else's backstories and motivations…and reveals the many secrets and lies they carry. This isn't just an exciting mystery, though. It also sheds light (so to speak) on the position of women at this time in history, as well as Ada's mixture of regret and excitement at being childless and able to pursue new kinds of passions.
Whether readers listen to RUBY FALLS in the dark or read it with all the lights on, they'll want to carve out some time to explore this rewarding historical mystery.
Reviewed by Norah Piehl
October 5, 2025
Oh my! I really loved this different, unique, historical locked-room mystery! It is also based on a real place.
Taking place during the Great Depression, Ruby Lambert's husband, Leo, discovers a big waterfall in of Lookout Mountain. This is where they have been mining, and this discovery is unexpected. People come from all over to see it.
Ada Smith is Ruby's best friend. She has lost her husband, and the depression has hit. She begins exploring the caves and tunnels of Lookout Mountain at night when no one is around. While doing this, she meets a worker one night named Quinton. He does not judge or condemn Ada, but instead gives her advice on exploring, and even joins her at times.
The depression affects their town hard, and especially Leo and Ruby. They made a huge investment and turned Ruby Falls into a tourist attraction with a restaurant, tours, and weekend dances. However, to drum up more business, Leo decides to invite Jeremiah Hagathorn to partake in a PR event. Hagathorn is a renowned mind reader. LEo will have 2 of his most trusted people hide a hat key somewhere in the monstrous caves and tunnels. Then a group of people, including the two hiders, a journalist, Hagathorn's wife, and a tour guide, will go down and Hagathorn will have 12 hours to find it. Unbeknownst to the group, Ada and Quinton are hired to follow the group from a distance to keep an eye and provide a safety net.
However, tragedy happens and Ada and Quinton have to get the other explorers out before another death occurs.
This was a claustrophobic, atmospheric mystery. I really liked most of the characters. I really liked the characters, especially Ada and Quinton. They are intelligent and resourceful. Ruby is also very likable. This is more a mystery than a thriller, but there are tense moments and just an overall dark, closed in vibe. IT is very well written and comes together nicely, and I was a little surprised at the reveal- or more for the motivation behind the crime! Well done!
There is a lot of reflection in the characters, that at times made the story drag a bit. And it is told through multiple viewpoints- but I felt this worked for the story. I highly recommend for anyone interested in a mystery with a unique take on the locked room mystery!
I also highly recommend the author's note at the end. I found it very interesting about the history of the falls!
Thank you to NetGalley and Atlantic Crime for the ARC. This is my honest and voluntary review.
Taking place during the Great Depression, Ruby Lambert's husband, Leo, discovers a big waterfall in of Lookout Mountain. This is where they have been mining, and this discovery is unexpected. People come from all over to see it.
Ada Smith is Ruby's best friend. She has lost her husband, and the depression has hit. She begins exploring the caves and tunnels of Lookout Mountain at night when no one is around. While doing this, she meets a worker one night named Quinton. He does not judge or condemn Ada, but instead gives her advice on exploring, and even joins her at times.
The depression affects their town hard, and especially Leo and Ruby. They made a huge investment and turned Ruby Falls into a tourist attraction with a restaurant, tours, and weekend dances. However, to drum up more business, Leo decides to invite Jeremiah Hagathorn to partake in a PR event. Hagathorn is a renowned mind reader. LEo will have 2 of his most trusted people hide a hat key somewhere in the monstrous caves and tunnels. Then a group of people, including the two hiders, a journalist, Hagathorn's wife, and a tour guide, will go down and Hagathorn will have 12 hours to find it. Unbeknownst to the group, Ada and Quinton are hired to follow the group from a distance to keep an eye and provide a safety net.
However, tragedy happens and Ada and Quinton have to get the other explorers out before another death occurs.
This was a claustrophobic, atmospheric mystery. I really liked most of the characters. I really liked the characters, especially Ada and Quinton. They are intelligent and resourceful. Ruby is also very likable. This is more a mystery than a thriller, but there are tense moments and just an overall dark, closed in vibe. IT is very well written and comes together nicely, and I was a little surprised at the reveal- or more for the motivation behind the crime! Well done!
There is a lot of reflection in the characters, that at times made the story drag a bit. And it is told through multiple viewpoints- but I felt this worked for the story. I highly recommend for anyone interested in a mystery with a unique take on the locked room mystery!
I also highly recommend the author's note at the end. I found it very interesting about the history of the falls!
Thank you to NetGalley and Atlantic Crime for the ARC. This is my honest and voluntary review.
March 6, 2026
Locked Room Mystery More On Women's Fiction End Than Horror End. Growing up at the border of Appalachia and Atlanta, halfway between Chattanooga and Atlanta, I saw the "See Rock City" signs - mostly barns - quite frequently. Have even been out there both on school field trips and with my family, and indeed my youngest brother actually proposed to his now wife on top of Lookout Mountain. In other words, I know the modern version of the mountain - and the caves - fairly well. (Though to be clear, I haven't seen the 2020s era updates.) Thus, you, oh reader of my review, can easily see why a book about the modern origins of the tourist attraction known as Ruby Falls would entice me to read it.
The tale itself is a locked room mystery yet is more women's fiction than horror, though those with any hint of actual claustrophobia are going to find certain scenes here (at minimum) quite difficult to read. Probably even *worse* than *that* scene in Lee Child's Die Trying, the Reacher story that finds even Reacher crawling through a cave at one point. The use of the cave as the "locked room" is done quite excellently, as are the basic cave survival aspects, all in service to the actual story being told.
But we *are* getting a lot more relational drama than the straight up terror from a tale such as Greig Beck's Beneath The Dark Ice, even as a murder mystery unfolds deep underground. This is the Great Depression and this is still the age of people claiming to be clairvoyant... many of whom turn out to be hucksters... but not all. The era when the caves - and the Falls - were first discovered by modern man nearly a century ago as this book is released in March 2026, and we do in fact get to hear about the moment of their discovery as part of this story.
For those looking for a women's fiction tale with a bit more kick, or perhaps a locked room murder mystery a touch more on the relational side than the terror side, this book is going to be pretty close to exactly what you're looking for. Those looking for a more pure survival or horror tale... not so much.
Ultimately though this is truly a great tale of its form that does great service to its real world subject even as it creates a fictional story around the real-world history. For the millions... and millions! (cheap pop!)... who have been to Ruby Falls or who live in the surrounding regions or who enjoy these types of tales, this is absolutely going to be a book you're going to want to pick up.
Very much recommended.
The tale itself is a locked room mystery yet is more women's fiction than horror, though those with any hint of actual claustrophobia are going to find certain scenes here (at minimum) quite difficult to read. Probably even *worse* than *that* scene in Lee Child's Die Trying, the Reacher story that finds even Reacher crawling through a cave at one point. The use of the cave as the "locked room" is done quite excellently, as are the basic cave survival aspects, all in service to the actual story being told.
But we *are* getting a lot more relational drama than the straight up terror from a tale such as Greig Beck's Beneath The Dark Ice, even as a murder mystery unfolds deep underground. This is the Great Depression and this is still the age of people claiming to be clairvoyant... many of whom turn out to be hucksters... but not all. The era when the caves - and the Falls - were first discovered by modern man nearly a century ago as this book is released in March 2026, and we do in fact get to hear about the moment of their discovery as part of this story.
For those looking for a women's fiction tale with a bit more kick, or perhaps a locked room murder mystery a touch more on the relational side than the terror side, this book is going to be pretty close to exactly what you're looking for. Those looking for a more pure survival or horror tale... not so much.
Ultimately though this is truly a great tale of its form that does great service to its real world subject even as it creates a fictional story around the real-world history. For the millions... and millions! (cheap pop!)... who have been to Ruby Falls or who live in the surrounding regions or who enjoy these types of tales, this is absolutely going to be a book you're going to want to pick up.
Very much recommended.
March 23, 2026
I wanted to read "Ruby Falls" by Gin Phillips partly because I grew up near Chattanooga, so the setting immediately caught my attention. I’ve always been fascinated by the history behind it, so I was very curious to see how the author would use the real Ruby Falls in a mystery. It is definitely a good location for one.
The story begins in 1928 when Leo Lambert discovers the stunning underground waterfall deep inside Lookout Mountain and names it Ruby Falls after his wife. The attraction opens just as the Great Depression begins—terrible timing—and the Lamberts are struggling to keep visitors coming.
Most of the story follows Ada, Ruby’s friend, who has secretly been exploring the caves and passageways inside Lookout Mountain at night. Ada quickly became one of my favorite characters. She’s intelligent, curious, and not always inclined to follow the rules—which makes her even more interesting. I also really liked Quinton, one of the guides, who is more of the quiet, dependable type.
Things take an unexpected turn when a famous mind reader arrives with an idea for a publicity stunt: someone will hide a hatpin inside the cave, and he will try to find it using psychic ability. What starts as a strange promotional event soon turns dangerous, and before long there’s a murder deep inside the mountain.
The setting is really the star of this novel. Much of the story takes place underground in near darkness, and Phillips does a fantastic job creating a claustrophobic atmosphere. You can practically feel the tight passages, damp caverns, and limited light as the characters struggle to make their way through the caves.
This is definitely more of a slow-burn mystery than a fast-paced thriller. The early part of the book spends a lot of time on character reflection and development, which made the pacing feel a little slow at times. But once the story shifts fully into the caves and the mystery unfolds, the tension builds nicely.
I also appreciated how the book weaves in themes of the era—life during the early days of the Great Depression, women finding their voices, and the complicated dynamics of a town trying to survive economically.
Overall, Ruby Falls is an atmospheric historical mystery with a fascinating real-life backdrop. If you enjoy stories that combine history, adventure, and a touch of suspense—especially with a unique setting—this one is definitely worth checking out.
(I received a complimentary copy of this book. Opinions expressed are my own.)
The story begins in 1928 when Leo Lambert discovers the stunning underground waterfall deep inside Lookout Mountain and names it Ruby Falls after his wife. The attraction opens just as the Great Depression begins—terrible timing—and the Lamberts are struggling to keep visitors coming.
Most of the story follows Ada, Ruby’s friend, who has secretly been exploring the caves and passageways inside Lookout Mountain at night. Ada quickly became one of my favorite characters. She’s intelligent, curious, and not always inclined to follow the rules—which makes her even more interesting. I also really liked Quinton, one of the guides, who is more of the quiet, dependable type.
Things take an unexpected turn when a famous mind reader arrives with an idea for a publicity stunt: someone will hide a hatpin inside the cave, and he will try to find it using psychic ability. What starts as a strange promotional event soon turns dangerous, and before long there’s a murder deep inside the mountain.
The setting is really the star of this novel. Much of the story takes place underground in near darkness, and Phillips does a fantastic job creating a claustrophobic atmosphere. You can practically feel the tight passages, damp caverns, and limited light as the characters struggle to make their way through the caves.
This is definitely more of a slow-burn mystery than a fast-paced thriller. The early part of the book spends a lot of time on character reflection and development, which made the pacing feel a little slow at times. But once the story shifts fully into the caves and the mystery unfolds, the tension builds nicely.
I also appreciated how the book weaves in themes of the era—life during the early days of the Great Depression, women finding their voices, and the complicated dynamics of a town trying to survive economically.
Overall, Ruby Falls is an atmospheric historical mystery with a fascinating real-life backdrop. If you enjoy stories that combine history, adventure, and a touch of suspense—especially with a unique setting—this one is definitely worth checking out.
(I received a complimentary copy of this book. Opinions expressed are my own.)
Review of advance copy received from Netgalley
Nothing will turn a head more than a 150 foot waterfall during the sorrows of the Great Depression.
Gin Phillips creates a journey into the unexpected discovery of an amazing natural wonder located outside Chattanooga, Tennessee in 1928. Phillips is known for her ability to spike tension to a high level as she did in Fierce Kingdom (2017) in which a mother and child are in lock down at a local zoo by an unknown assailant. That one will have you eating chunks of popcorn in a nano second.
Ruby Falls opens with a mother and her children on edge when their husband/father fails to make it home after a long day in the mine. Families have been conditioned to realize the pounding dangers of such an occupation. But finding work during the Great Depression was almost an illusion and any means to just put food on the table was a huge undertaking.
Leo Lambert finally shows up on the doorstep. He's discovered something beyond words. Yes, it's the aforementioned falls which he names after his own wife, Ruby. Ruby's friend, Ada Smith, becomes smitten by the idea of such an adventure. Ada takes it upon herself to climb through those compressed areas to visit the falls. Then Ruby and Leo decide to charge admission for the fascinating sight. It becomes a draw for people to set their eyes upon something amazing instead of dwelling on their own personal dead ends of the Depression.
Phillips stirs things up with the addition of a mind reader who will try to find a hat pin (Yup!) within the cave. Anything to draw more people to this attraction. But it soon becomes obvious that one of them in the group has been murdered. Shades of Agatha Christie! More like a locked cave mystery. Quite the adventure and quite the read.
I received a copy of this book through NetGalley for an honest review. My thanks to Grove Atlantic and to the talented Gin Phillips for the opportunity.
Gin Phillips creates a journey into the unexpected discovery of an amazing natural wonder located outside Chattanooga, Tennessee in 1928. Phillips is known for her ability to spike tension to a high level as she did in Fierce Kingdom (2017) in which a mother and child are in lock down at a local zoo by an unknown assailant. That one will have you eating chunks of popcorn in a nano second.
Ruby Falls opens with a mother and her children on edge when their husband/father fails to make it home after a long day in the mine. Families have been conditioned to realize the pounding dangers of such an occupation. But finding work during the Great Depression was almost an illusion and any means to just put food on the table was a huge undertaking.
Leo Lambert finally shows up on the doorstep. He's discovered something beyond words. Yes, it's the aforementioned falls which he names after his own wife, Ruby. Ruby's friend, Ada Smith, becomes smitten by the idea of such an adventure. Ada takes it upon herself to climb through those compressed areas to visit the falls. Then Ruby and Leo decide to charge admission for the fascinating sight. It becomes a draw for people to set their eyes upon something amazing instead of dwelling on their own personal dead ends of the Depression.
Phillips stirs things up with the addition of a mind reader who will try to find a hat pin (Yup!) within the cave. Anything to draw more people to this attraction. But it soon becomes obvious that one of them in the group has been murdered. Shades of Agatha Christie! More like a locked cave mystery. Quite the adventure and quite the read.
I received a copy of this book through NetGalley for an honest review. My thanks to Grove Atlantic and to the talented Gin Phillips for the opportunity.
March 15, 2026
My early childhood years were spent in the Deep South and one of my family’s favorite vacation spots was Chattanooga. I loved the trips there and I especially loved touring Ruby Falls. Therefore, I was thrilled to receive this novel from @novelsuspects and @atlanticcrime .
Deep inside Lookout Mountain in Chattanooga, lies Ruby Falls, a 150 foot waterfall discovered by Leo Lambert in 1928 and named after his wife Ruby. He builds a “castle” with stone from the excavation and opens it to the public for tours in the hope it will get his family through the Great Depression. and signs advertising it are scattered along highways of the South. This is the inspiration and setting for this novel by Gin Phillips.
The novel centers around Ruby’s friend Ada who has been secretly exploring it. When discovered by one of the guides, she is recommended to Leo to help with a publicity stunt he has planned. Leo has invited a famous psychic to the falls to hunt for a hairpin. What follows is a murder deep within the mountain.
This novel is a combination of historical fiction and a locked room mystery with a little romance added in and I found it highly entertaining. Enshrouded in darkness with only minimum light to lead them through the vast cavern the setting creates an intense feeling of claustrophobia, dread and suspense that greatly appealed to me.
I will say this is a bit of a slow burn, but I didn’t really mind it as I enjoyed the author’s attention to detail and the authentic setting it created. The mystery element was well done and put me in mind of an Agatha Christie whodunnit. This was a unique read that captured a feeling of nostalgia for me that I really appreciated. I’ve included a photo of the castle and the cave and waterfall from a trip down memory lane I took to Chattanooga a few years ago.
Deep inside Lookout Mountain in Chattanooga, lies Ruby Falls, a 150 foot waterfall discovered by Leo Lambert in 1928 and named after his wife Ruby. He builds a “castle” with stone from the excavation and opens it to the public for tours in the hope it will get his family through the Great Depression. and signs advertising it are scattered along highways of the South. This is the inspiration and setting for this novel by Gin Phillips.
The novel centers around Ruby’s friend Ada who has been secretly exploring it. When discovered by one of the guides, she is recommended to Leo to help with a publicity stunt he has planned. Leo has invited a famous psychic to the falls to hunt for a hairpin. What follows is a murder deep within the mountain.
This novel is a combination of historical fiction and a locked room mystery with a little romance added in and I found it highly entertaining. Enshrouded in darkness with only minimum light to lead them through the vast cavern the setting creates an intense feeling of claustrophobia, dread and suspense that greatly appealed to me.
I will say this is a bit of a slow burn, but I didn’t really mind it as I enjoyed the author’s attention to detail and the authentic setting it created. The mystery element was well done and put me in mind of an Agatha Christie whodunnit. This was a unique read that captured a feeling of nostalgia for me that I really appreciated. I’ve included a photo of the castle and the cave and waterfall from a trip down memory lane I took to Chattanooga a few years ago.
Review of advance copy received from Publisher
I have been a tremendous fan of Gin Phillips since being riveted by her brilliant 2017 novel, "Fierce Kingdom" -- a magnificent, terrifying novel about a mother and child trapped in a zoo WITH ACTIVE SHOOTERS after dark. Well, I loved "Ruby Falls," her brand new novel, even more. It's Depression-era Tennessee and a psychic is going to find a hairpin hidden somewhere deep in a cave as a publicity stunt to draw attention to the struggling tourist attraction and natural wonder, Ruby Falls: a waterfall 150 underground and its nearby aboveground restaurant. Over the course of a day (and then into the night and the small hours of the morning), six people will traverse those caves, claustrophobic passageways, and slender tunnels, always in the dark, often lost. And watching over them from a distance are two experienced cavers. And since we know from the bats and spiders and millipedes and ants we meet on the first page that at least one of this group is dead -- his corpse is their "banquet" -- the tension is exquisite. We adore mysteries and novels of suspense because we crave dread, and this electrifying novel is a deep dive into an emotion that keeps us glued to a book. But Phillips is also a writer whose characters are as real as our families and neighbors: we see them, we hear them, we get them. Those two cavers watching over the motley crew as best they can in the cramped, frightening darkness, Ada and Quinton? You will be pulling for them every moment you are underground with them. "Ruby Falls" is smart, harrowing, and intense. I loved it.
March 6, 2026
Many thanks to NetGalley and Grove Atlantic | Atlantic Crime for gifting me a digital ARC of the latest book by Gin Phillips. All opinions expressed in this review are my own - 4 stars!
In 1928, a Chattanooga man disappears down a hole in the ground and discovers a 150-foot waterfall in the middle of a mountain that he names Ruby Falls, after his wife. Soon, visitors can buy tickets to see the falls for themselves. A friend of Rub, Ada Smith, has been sneaking into the caves at night, enthralled with the beauty and freedom. But it's the Depression and Ruby Falls is struggling. A famous mind reader and mystic agrees to go into the caverns and attempt to locate a hidden hatpin using only his psychic abilities. He'll be joined by his wife, his manager, a guide, a businessman and a reporter. But Ada and another guide, Quinton, will be following the party at a distance in case they run into trouble. .One of them will be dead before the end of the day.
What a unique locked-room mystery - set almost entirely underground in just one day. It's claustrophobic and full of tension as the group must get back to safety before they completely lose their light. It takes you back to a different time period in the country, with the Depression looming, and women's rights as a theme. It was a bit of a slow burn and for some reason I had trouble keeping the characters straight in my mind, but it was a good, atmospheric thriller based on real life (be sure to read the acknowledgements for more info!)..
In 1928, a Chattanooga man disappears down a hole in the ground and discovers a 150-foot waterfall in the middle of a mountain that he names Ruby Falls, after his wife. Soon, visitors can buy tickets to see the falls for themselves. A friend of Rub, Ada Smith, has been sneaking into the caves at night, enthralled with the beauty and freedom. But it's the Depression and Ruby Falls is struggling. A famous mind reader and mystic agrees to go into the caverns and attempt to locate a hidden hatpin using only his psychic abilities. He'll be joined by his wife, his manager, a guide, a businessman and a reporter. But Ada and another guide, Quinton, will be following the party at a distance in case they run into trouble. .One of them will be dead before the end of the day.
What a unique locked-room mystery - set almost entirely underground in just one day. It's claustrophobic and full of tension as the group must get back to safety before they completely lose their light. It takes you back to a different time period in the country, with the Depression looming, and women's rights as a theme. It was a bit of a slow burn and for some reason I had trouble keeping the characters straight in my mind, but it was a good, atmospheric thriller based on real life (be sure to read the acknowledgements for more info!)..
March 21, 2026
All buildup, no breakthrough, a cave full of atmosphere but short on payoff.
Ruby Falls by Gin Phillips has the kind of setting I’m always drawn to, dark, enclosed, and full of potential for tension. After finishing Her Last Breath by Taylor Adams, a book that left me buzzing with adrenaline, I went searching for another cave‑set thriller to keep that energy going.
While Ruby Falls offers an atmospheric backdrop and an intriguing premise, the thriller element never quite takes off. I never felt that edge‑of‑my‑seat urgency or the claustrophobic tension that usually comes with stories set underground. And when the plot finally started building toward what felt like a major payoff, it ultimately fizzled. There’s a lot of setup, a lot of hinting at something big, but in the end… nothing really happens.
A decent read for the setting alone, but it doesn’t deliver the intensity or the payoff that the premise promises.
In 1928, the discovery of a massive underground waterfall, soon named Ruby Falls, draws national attention. As the Great Depression looms, a publicity stunt is staged to keep the attraction alive: a famous mind reader will descend into the caverns with a small group to perform a psychic feat deep underground. Ada Smith, a young cave guide who feels more alive below the surface than above it, is tasked with shadowing the group from a distance as a safety measure. But when one member of the party turns up dead, Ada must navigate the darkness, the dwindling light, and a killer hidden among them to get everyone back to the surface alive.
Ruby Falls by Gin Phillips has the kind of setting I’m always drawn to, dark, enclosed, and full of potential for tension. After finishing Her Last Breath by Taylor Adams, a book that left me buzzing with adrenaline, I went searching for another cave‑set thriller to keep that energy going.
While Ruby Falls offers an atmospheric backdrop and an intriguing premise, the thriller element never quite takes off. I never felt that edge‑of‑my‑seat urgency or the claustrophobic tension that usually comes with stories set underground. And when the plot finally started building toward what felt like a major payoff, it ultimately fizzled. There’s a lot of setup, a lot of hinting at something big, but in the end… nothing really happens.
A decent read for the setting alone, but it doesn’t deliver the intensity or the payoff that the premise promises.
In 1928, the discovery of a massive underground waterfall, soon named Ruby Falls, draws national attention. As the Great Depression looms, a publicity stunt is staged to keep the attraction alive: a famous mind reader will descend into the caverns with a small group to perform a psychic feat deep underground. Ada Smith, a young cave guide who feels more alive below the surface than above it, is tasked with shadowing the group from a distance as a safety measure. But when one member of the party turns up dead, Ada must navigate the darkness, the dwindling light, and a killer hidden among them to get everyone back to the surface alive.
November 29, 2025
Growing up in Tennessee, I have seen the billboards along highways and interstates for Ruby Falls my entire life. I have even visited there on more than one occasion as a child. So, when I saw there was a murder mystery that takes place right here in my own backyard...sign me up!
We are in the late 1920s, and Ruby Falls is not as fully developed as it is now. We join in progress a situation that involves caves. There isa lot of backstory of the protagonist in the first part of the book. It allows for a lot of depth of character for later.
We do find ourselves with a group that is going deep into the caves. This part of the story has strong Agatha Christie vibes, and I am all for it. When they find themselves in peril, a body turns up. Now, not only are they trying to survive, but they know the killer is one of their own and must find out who it is. If they survive nature, a huge “IF”, they may not survive the killer.
There was only one part of the story that didn’t connect with me and that was a part of sexual tension. I see where it could fit in the protagonist’s story, but it just didn’t seem to fit the rest of the novel.
Check out “Ruby Falls”, the novel. Well, while we are at it, why don’t y’all come on down to Tennessee and visit Ruby Falls. Enjoy some sweet tea. Sit a spell on my front porch. We will talk about books.
I received this ARC from NetGalley and the publisher in exchange for an unbiased review.
We are in the late 1920s, and Ruby Falls is not as fully developed as it is now. We join in progress a situation that involves caves. There isa lot of backstory of the protagonist in the first part of the book. It allows for a lot of depth of character for later.
We do find ourselves with a group that is going deep into the caves. This part of the story has strong Agatha Christie vibes, and I am all for it. When they find themselves in peril, a body turns up. Now, not only are they trying to survive, but they know the killer is one of their own and must find out who it is. If they survive nature, a huge “IF”, they may not survive the killer.
There was only one part of the story that didn’t connect with me and that was a part of sexual tension. I see where it could fit in the protagonist’s story, but it just didn’t seem to fit the rest of the novel.
Check out “Ruby Falls”, the novel. Well, while we are at it, why don’t y’all come on down to Tennessee and visit Ruby Falls. Enjoy some sweet tea. Sit a spell on my front porch. We will talk about books.
I received this ARC from NetGalley and the publisher in exchange for an unbiased review.
Review of advance copy received from Publisher
Thank you @novelsuspects @atlanticcrime for my #gifted copy of Ruby Falls!
Sometimes, I see "historical mystery" and I worry that it will be too cozy for me.
Ruby Falls is anything but cozy. Tense, claustrophobic, riveting. With a real sense of danger as the characters' water and lights run out, stuck underground with a possible murderer.
Ada is a 40something widow during the Great Depression in Chattanooga. When her friend's husband Leo discovers an underground waterfall and makes it into a tourist attraction, Ada reclaims a bit of something for herself when she starts exploring it after hours. She continues to explore even after being discovered by fellow caver Quinton.
Leo invites a mind reader to find a hatpin in the caverns, a PR ploy as restaurants close and bread lines grow. Quinton and Ada follow behind the motley search party as a safety net, just in case trouble arises. And it certainly does.
Ada is a force to be reckoned with. She's spent her life as a daughter and wife and is worried she will now fade into oblivion. She wants to forge her own path. An astute observer of people, the "crooks and crevices" inside all of us that echo the caves.
The first part of the novel sets the stage, introducing us to the characters and the terrifying beauty of the caves. But once the clock starts ticking to finding that pin, the story grabs you and doesn't let go until the end.
This is in no way a romance. But also? I loved the romance angle. 4.5 stars
Sometimes, I see "historical mystery" and I worry that it will be too cozy for me.
Ruby Falls is anything but cozy. Tense, claustrophobic, riveting. With a real sense of danger as the characters' water and lights run out, stuck underground with a possible murderer.
Ada is a 40something widow during the Great Depression in Chattanooga. When her friend's husband Leo discovers an underground waterfall and makes it into a tourist attraction, Ada reclaims a bit of something for herself when she starts exploring it after hours. She continues to explore even after being discovered by fellow caver Quinton.
Leo invites a mind reader to find a hatpin in the caverns, a PR ploy as restaurants close and bread lines grow. Quinton and Ada follow behind the motley search party as a safety net, just in case trouble arises. And it certainly does.
Ada is a force to be reckoned with. She's spent her life as a daughter and wife and is worried she will now fade into oblivion. She wants to forge her own path. An astute observer of people, the "crooks and crevices" inside all of us that echo the caves.
The first part of the novel sets the stage, introducing us to the characters and the terrifying beauty of the caves. But once the clock starts ticking to finding that pin, the story grabs you and doesn't let go until the end.
This is in no way a romance. But also? I loved the romance angle. 4.5 stars
Review of advance copy received from Netgalley
I wanted to read this book because I have been to Ruby Falls twice and was fascinated by it. I read the synopsis and was intrigued to see how the author would incorporate a mystery into the history of Ruby Falls.
I can say that this was very atmospheric! I give 5 stars to the setting, because I literally felt like I was back there exploring. She did such a fantastic job describing Ruby Falls. I love the historical account in the beginning of how Ruby Falls was discovered also.
The main mystery plot was done really well. I could feel the aggravation the characters were feeling because I was also very aggravated. Had I been in that situation the outcome would have developed differently. There is no way I could have been stuck with those people in that cave.
The one part that I didn't really enjoy was the little romance subplot. It didn't need it and felt very disjointed from the rest of the book. One scene in particular was so out of place that it was more shocking to me than any of the things that occurred in the main plot. This book was intriguing enough without it.
I would recommend this book to anyone who is an explorer at heart and wants to add a little mystery in their reading..
I give this book a 3.75 rating rounded up to 4.
Thank you to NetGalley and Grove Atlantic/Atlantic Crime for the eARC. *This review is 100% my honest opinion*
I can say that this was very atmospheric! I give 5 stars to the setting, because I literally felt like I was back there exploring. She did such a fantastic job describing Ruby Falls. I love the historical account in the beginning of how Ruby Falls was discovered also.
The main mystery plot was done really well. I could feel the aggravation the characters were feeling because I was also very aggravated. Had I been in that situation the outcome would have developed differently. There is no way I could have been stuck with those people in that cave.
The one part that I didn't really enjoy was the little romance subplot. It didn't need it and felt very disjointed from the rest of the book. One scene in particular was so out of place that it was more shocking to me than any of the things that occurred in the main plot. This book was intriguing enough without it.
I would recommend this book to anyone who is an explorer at heart and wants to add a little mystery in their reading..
I give this book a 3.75 rating rounded up to 4.
Thank you to NetGalley and Grove Atlantic/Atlantic Crime for the eARC. *This review is 100% my honest opinion*
Review of advance copy received from Netgalley
In 1928, a Chattanooga man disappears down a hole in the ground and discovers a 150-foot waterfall in the middle of a mountain that he names after his wife: Ruby Falls. Within months, visitors can buy tickets to see the falls for themselves. But it’s tough timing for a natural wonder. As the country flounders in the Great Depression, a shrewd public relations ploy seems like the only way to save Ruby Falls. A famous mind reader and mystic agrees to launch himself into the Ruby Falls caverns where he will attempt to locate a hidden hatpin using only his psychic abilities. But things do not go as planned!
First off, let me just say, I LOVED this setting! Ruby Falls is a beautiful place. It is not very far from me. So to have a book set here just made my day! Plus, I learned so much about the history!
This story is so atmospheric and has good intensity! It takes place almost completely underground in the caverns of Ruby Falls. It has little bit of everything, romance, science, history, murder and mayhem!
And the characters!! I fell hard for Quinton. He is the strong silent type! Ada is a good girl but she does not always follow the rules and this just endeared me to her! And let’s not forget the crazy psychic. You talk about a piece of work!
Need a story about more than one discovery…THIS IS IT! Grab your copy today!
I received this novel for a honest review.
First off, let me just say, I LOVED this setting! Ruby Falls is a beautiful place. It is not very far from me. So to have a book set here just made my day! Plus, I learned so much about the history!
This story is so atmospheric and has good intensity! It takes place almost completely underground in the caverns of Ruby Falls. It has little bit of everything, romance, science, history, murder and mayhem!
And the characters!! I fell hard for Quinton. He is the strong silent type! Ada is a good girl but she does not always follow the rules and this just endeared me to her! And let’s not forget the crazy psychic. You talk about a piece of work!
Need a story about more than one discovery…THIS IS IT! Grab your copy today!
I received this novel for a honest review.
Review of advance copy received from Goodreads Giveaways
Ruby Falls by Gin Phillips absolutely wrecked my nerves in the best possible way.
This book is basically one long anxiety spiral — and I mean that as the highest compliment. From the very first chapter, I felt trapped right alongside the main character, and the tension just never let up. It’s claustrophobic, intense, and deeply psychological without ever feeling overdone.
What really stood out to me was how personal the danger felt. It wasn’t just “something bad is happening.” It was layered with emotional stakes, complicated relationships, and that constant creeping dread that something worse is just around the corner. I kept thinking, okay, surely we get a breather now — and nope. We do not.
Gin Phillips does such a great job capturing fear in a way that feels raw and realistic. I could practically feel the panic through the pages. And yet, it wasn’t just nonstop chaos — there were quiet moments that made the characters feel real and grounded, which somehow made everything scarier.
This was the kind of thriller that makes you forget to check your phone, forget what time it is, and maybe double-check your locks before bed.
Easy five stars for me. If you love tense, character-driven thrillers that make your heart race, this one absolutely delivers.
This book is basically one long anxiety spiral — and I mean that as the highest compliment. From the very first chapter, I felt trapped right alongside the main character, and the tension just never let up. It’s claustrophobic, intense, and deeply psychological without ever feeling overdone.
What really stood out to me was how personal the danger felt. It wasn’t just “something bad is happening.” It was layered with emotional stakes, complicated relationships, and that constant creeping dread that something worse is just around the corner. I kept thinking, okay, surely we get a breather now — and nope. We do not.
Gin Phillips does such a great job capturing fear in a way that feels raw and realistic. I could practically feel the panic through the pages. And yet, it wasn’t just nonstop chaos — there were quiet moments that made the characters feel real and grounded, which somehow made everything scarier.
This was the kind of thriller that makes you forget to check your phone, forget what time it is, and maybe double-check your locks before bed.
Easy five stars for me. If you love tense, character-driven thrillers that make your heart race, this one absolutely delivers.
March 3, 2026
Wow! I cannot recommend this book enough.
At first, the writing style was a bit different from what I’m used to, and it took me a little while to settle into the rhythm. But trust me, if you pick it up (and you absolutely should!), it’s well worth pushing through.
The beginning may feel slow, as it focuses heavily on character development, but all of that foundation pays off beautifully later on. Once the story shifts to Ruby Falls, I was completely immersed. Phillips has such a gift for setting, making me feel as though I was right there, navigating the dark, crawling through tight spaces, and climbing alongside the characters.
Oh, Ada. My heart ached for her. I just wanted to hug her and give her everything she longed for. Her inner dialogue was so relatable, I often found myself nodding in agreement, as though her thoughts were my own.
What I loved most was how the mystery kept me guessing until the very end. I kept changing my mind about who the culprit was. The suspense was perfectly executed, making it a thrilling ride from start to finish!
I received a complementary copy of this book. Opinions expressed in this review are completely my own.
At first, the writing style was a bit different from what I’m used to, and it took me a little while to settle into the rhythm. But trust me, if you pick it up (and you absolutely should!), it’s well worth pushing through.
The beginning may feel slow, as it focuses heavily on character development, but all of that foundation pays off beautifully later on. Once the story shifts to Ruby Falls, I was completely immersed. Phillips has such a gift for setting, making me feel as though I was right there, navigating the dark, crawling through tight spaces, and climbing alongside the characters.
Oh, Ada. My heart ached for her. I just wanted to hug her and give her everything she longed for. Her inner dialogue was so relatable, I often found myself nodding in agreement, as though her thoughts were my own.
What I loved most was how the mystery kept me guessing until the very end. I kept changing my mind about who the culprit was. The suspense was perfectly executed, making it a thrilling ride from start to finish!
I received a complementary copy of this book. Opinions expressed in this review are completely my own.
March 20, 2026
Ruby Falls was a hit for me as far as the historical fiction aspect and the setting. I found Ada’s character to be interesting and thought she was well written as she struggled with some things in the past, while finding herself after losing her husband. Phillips also brings great tension to the story through all of the characters different personalities and the close proximity and dangers they face while exploring the cave.
The pacing of the story started out strong, but it slowed down at about the halfway point. I thought the whodunnit aspect worked well and I always enjoy these types of stories when all of the characters are suspects. But I did find that the reveal at the end fell a little flat for me and seemed to be wrapped up too quickly.
𝐖𝐡𝐚𝐭 𝐭𝐨 𝐄𝐱𝐩𝐞𝐜𝐭:
* Multiple POVs
* Historical Fiction
* Cave Exploration
* Great Depression Era
* Murder Mystery
𝐒𝐩𝐢𝐜𝐞 𝐋𝐞𝐯𝐞𝐥: 🚫
I really enjoyed Phillips writing style, and a lot of her phrases and comparisons resonated with me, being a fellow southerner. If you are a fan of historical fiction books, with a locked room (cave) mystery, and some great tension in a unique setting, then I would recommend adding Ruby Falls to your TBR.
The pacing of the story started out strong, but it slowed down at about the halfway point. I thought the whodunnit aspect worked well and I always enjoy these types of stories when all of the characters are suspects. But I did find that the reveal at the end fell a little flat for me and seemed to be wrapped up too quickly.
𝐖𝐡𝐚𝐭 𝐭𝐨 𝐄𝐱𝐩𝐞𝐜𝐭:
* Multiple POVs
* Historical Fiction
* Cave Exploration
* Great Depression Era
* Murder Mystery
𝐒𝐩𝐢𝐜𝐞 𝐋𝐞𝐯𝐞𝐥: 🚫
I really enjoyed Phillips writing style, and a lot of her phrases and comparisons resonated with me, being a fellow southerner. If you are a fan of historical fiction books, with a locked room (cave) mystery, and some great tension in a unique setting, then I would recommend adding Ruby Falls to your TBR.
Review of advance copy received from Netgalley
Ruby Falls stands out most for its setting and atmosphere. The underground caves during the Great Depression are eerie, claustrophobic, and beautifully rendered—the sense of darkness and isolation is constant and effective. The setting easily feels like the strongest character in the book.
Ada is a compelling protagonist: grieving, restless, and drawn to the caves as a way to feel alive again. Her partnership with Quinton was a highlight, and the locked-room-style mystery built around a publicity stunt gone wrong is a strong, intriguing premise.
However, the pacing held this one back for me. There’s a lot of reflection and introspection, which adds depth but slows the momentum, and it takes a while for the tension to fully kick in. The ending resolves the mystery, but the tonal shift felt a bit abrupt.
Overall, this is a well-written, moody historical mystery with a truly unique setting, but it leans more atmospheric than suspenseful.
Thank you to NetGalley and Grove Atlantic | Atlantic Crime for this eARC!
Ada is a compelling protagonist: grieving, restless, and drawn to the caves as a way to feel alive again. Her partnership with Quinton was a highlight, and the locked-room-style mystery built around a publicity stunt gone wrong is a strong, intriguing premise.
However, the pacing held this one back for me. There’s a lot of reflection and introspection, which adds depth but slows the momentum, and it takes a while for the tension to fully kick in. The ending resolves the mystery, but the tonal shift felt a bit abrupt.
Overall, this is a well-written, moody historical mystery with a truly unique setting, but it leans more atmospheric than suspenseful.
Thank you to NetGalley and Grove Atlantic | Atlantic Crime for this eARC!
Review of advance copy received from Publisher
Ada, a widow, and Quentin, a man with a difficult past, find themselves paired as sort of guardrails for Jeremiah, who claims to be able to read minds, and an entourage who have entered the Ruby Falls cave as part of a publicity stunt. This is indeed claustrophobic, as much of it takes place in what was meant to be a 12 hour underground exploration. Ada loves everything about the cave. Jeremiah, his wife, a newspaperman, his manager, and a local businessman, make an odd group and you, like me, might struggle a bit to keep everyone (and their guide) straight. And then one of them is killed in a way that seemed, gotta say, implausible to me. Who did it and why? Ada and Quentin have to get this group out of the cave. This eventually began to drag for me, the romantic aspect felt inappropriate, and I found it increasingly difficult to care about anyone or the identity of the villain. Ada and Quentin are well drawn but the rest not so much. I did like the ending. Thanks to the publisher for the ARC. This is definitely worth a read for those intrigued by caving.
Review of advance copy received from Netgalley
The 1930s was a decade full of gimmicks to earn some much needed cash.
Ruby Falls in the southeast corner of Tennessee fit the angle for news sensation hypeability.
Much of the story occurs underground, in the maze of caverns and caves near the falls.
Ada is part mole as she routinely has snuck in to explore the caverns at night, deep in the bowels of earth.
I’m not normally claustrophobic but the apt description of the tight crevices and squeezes made me swing my arms out to ensure I had space.
A murder occurs during the news spectacle and Phillips kept me puzzling about who could be the perp.
What made this book interesting to read was I used it live in Tennessee, close to Dunbar Cave State Park and loved the stories about the dances that were held there, similar to Ruby Falls.
Nature’s wonders are to be enjoyed but they always should be treated with respect and caution…….kind of like people.
Thanks to Gin Phillips, NetGalley, Edelweiss, Atlantic Crime, and the Tall Poppy Street Team for both the physical and digital copies!
Ruby Falls in the southeast corner of Tennessee fit the angle for news sensation hypeability.
Much of the story occurs underground, in the maze of caverns and caves near the falls.
Ada is part mole as she routinely has snuck in to explore the caverns at night, deep in the bowels of earth.
I’m not normally claustrophobic but the apt description of the tight crevices and squeezes made me swing my arms out to ensure I had space.
A murder occurs during the news spectacle and Phillips kept me puzzling about who could be the perp.
What made this book interesting to read was I used it live in Tennessee, close to Dunbar Cave State Park and loved the stories about the dances that were held there, similar to Ruby Falls.
Nature’s wonders are to be enjoyed but they always should be treated with respect and caution…….kind of like people.
Thanks to Gin Phillips, NetGalley, Edelweiss, Atlantic Crime, and the Tall Poppy Street Team for both the physical and digital copies!
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