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Metanoia Cave
What happens when solving one mystery creates another?
Disillusioned with the rat race of modern life and the state of society in general, 42-year-old Devin Allen trades in most of his worldly possessions for a simple life in Belize. His world is forever and further changed when an eccentric billionaire buys an old treasure map at an estate sale, unwittingly setting off a life-altering chain of events for a group of scientists and explorers. Metanoia Cave is a thrilling suspense novel spanning the globe, from the heartland of the USA to Belize to one of the most remote places on the planet. A deep dive into the heart of the ocean as well as human psychology, this adventurous tale explores the personal transformations of researchers unraveling a mystery as well as the far-reaching ramifications of split-second decisions made outside the parameters of society.
Disillusioned with the rat race of modern life and the state of society in general, 42-year-old Devin Allen trades in most of his worldly possessions for a simple life in Belize. His world is forever and further changed when an eccentric billionaire buys an old treasure map at an estate sale, unwittingly setting off a life-altering chain of events for a group of scientists and explorers. Metanoia Cave is a thrilling suspense novel spanning the globe, from the heartland of the USA to Belize to one of the most remote places on the planet. A deep dive into the heart of the ocean as well as human psychology, this adventurous tale explores the personal transformations of researchers unraveling a mystery as well as the far-reaching ramifications of split-second decisions made outside the parameters of society.
412 pages, Paperback
Published August 19, 2025
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Displaying 1 - 11 of 11 reviews
February 15, 2026
This is a great adventure story. The characters are all realistic and believable, and the plot twist is extradentary. Mr. Adams revels a fantastical and believable world. I enjoyed the book from the beginning to the end, and I look forward to reading more of his books. Highly recommend.
December 26, 2025
What an amazing book!! The author does a great job of developing the characters while taking you on an intriguing journey using dual timelines which end up merging in a very unexpected way. As the plot unfolds, you are caught up in a thrilling adventure in a mysterious cave that keeps you quickly turning the pages to find out how it will end. Extremely well written, very descriptive, as well as educational. I highly recommend this book to everyone!
January 22, 2026
One of the great traditions in storytelling is the search for lost treasure. As Metanoia Cave starts to unfold, we all but expect a treasure map with an ‘X’ to turn up. But author Ken Adams defies our expectations – not once, but over and over in this exciting and unpredictable story.
Adams is a skilled storyteller, mixing humor, tension, and genuine affection for the characters to take turns pulling us through the story. I was already grinning on the first two pages when a list of work emails turned up. It’s clear that Adams has served his time in Corporate America (Your Password is About to Expire….You have 16 overdue Success Factor learnings…). He is also extremely knowledgeable about the natural world.
Before I continue with the writing style, though, let’s get the basics of the story out of the way:
1. Rich, handsome playboy vs. genuine, smart, and kind girlfriend
2. Buried treasure. In this case, buried on the bottom of the sea in the South Atlantic…
3. …which allows for the Race Against Time, as inevitably some key characters find themselves underwater with a limited supply of oxygen
4. Greedy adventure junkies vs. curious scientists
We’re off to a great start when we begin to distinguish the scientific crew and their goals from the “graduates of Facebook University,” a bunch of know-nothings who are nonetheless well known due to their skill in making noise. Luckily for the reader, most of the story takes place in attractive locations like Belize and Tristan de Cunha, a remote, unspoiled island in the South Atlantic.
You get a strange feeling when you’re about to leave a place…like you’ll not only miss the people you love, but you’ll miss the person you are now at this time and place, because you’ll never be this way again. (Quoted by the book’s author from Azar Nafizi)
If we had any doubts where our author’s sympathies lie, they disappear quickly through the innovative use of short inter-chapters in which interesting and little-known biological facts are disclosed. We learn about ventilation in prairie dog towns, about how mushrooms communicate with one another, about extinct 8000-pound sloths who dug large tunnels thousands of feet long, which eventually became human habitations. I didn’t count these little asides, but there must be a couple of dozen of them, all of them interesting and, crucially, all somehow connected to the story we’re reading. This is a storytelling technique I have never encountered before, and I credit Adams with creating a truly innovative technique.
An aside: Don’t be afraid to use the library or the internet while reading this. The lost treasure, for example, actually exists, and the real story may be as interesting as the one I just read. It’s also worth looking up the definition of ‘metanoia’ if you’re unfamiliar with it. No, I’m not going to tell you!
I’m not going to tell you what happened in the book, either. Many of the characters who learned the truth ended up dead, and I would hate for that fate to befall this review’s readers. What I can say is that humans are capable of great compassion and great cruelty, and both are well illustrated here. Ken Adams’ Metanoia Cave is one wild adventure, but given the well-chosen sprinkling of information Adams provides us with, it is also, from a scientific perspective, not impossible. But what it really is, is a whole lot of fun to read.
Adams is a skilled storyteller, mixing humor, tension, and genuine affection for the characters to take turns pulling us through the story. I was already grinning on the first two pages when a list of work emails turned up. It’s clear that Adams has served his time in Corporate America (Your Password is About to Expire….You have 16 overdue Success Factor learnings…). He is also extremely knowledgeable about the natural world.
Before I continue with the writing style, though, let’s get the basics of the story out of the way:
1. Rich, handsome playboy vs. genuine, smart, and kind girlfriend
2. Buried treasure. In this case, buried on the bottom of the sea in the South Atlantic…
3. …which allows for the Race Against Time, as inevitably some key characters find themselves underwater with a limited supply of oxygen
4. Greedy adventure junkies vs. curious scientists
We’re off to a great start when we begin to distinguish the scientific crew and their goals from the “graduates of Facebook University,” a bunch of know-nothings who are nonetheless well known due to their skill in making noise. Luckily for the reader, most of the story takes place in attractive locations like Belize and Tristan de Cunha, a remote, unspoiled island in the South Atlantic.
You get a strange feeling when you’re about to leave a place…like you’ll not only miss the people you love, but you’ll miss the person you are now at this time and place, because you’ll never be this way again. (Quoted by the book’s author from Azar Nafizi)
If we had any doubts where our author’s sympathies lie, they disappear quickly through the innovative use of short inter-chapters in which interesting and little-known biological facts are disclosed. We learn about ventilation in prairie dog towns, about how mushrooms communicate with one another, about extinct 8000-pound sloths who dug large tunnels thousands of feet long, which eventually became human habitations. I didn’t count these little asides, but there must be a couple of dozen of them, all of them interesting and, crucially, all somehow connected to the story we’re reading. This is a storytelling technique I have never encountered before, and I credit Adams with creating a truly innovative technique.
An aside: Don’t be afraid to use the library or the internet while reading this. The lost treasure, for example, actually exists, and the real story may be as interesting as the one I just read. It’s also worth looking up the definition of ‘metanoia’ if you’re unfamiliar with it. No, I’m not going to tell you!
I’m not going to tell you what happened in the book, either. Many of the characters who learned the truth ended up dead, and I would hate for that fate to befall this review’s readers. What I can say is that humans are capable of great compassion and great cruelty, and both are well illustrated here. Ken Adams’ Metanoia Cave is one wild adventure, but given the well-chosen sprinkling of information Adams provides us with, it is also, from a scientific perspective, not impossible. But what it really is, is a whole lot of fun to read.
November 2, 2025
This is not the genre I normally read, but after a friend handed it to me, I gave it a shot. I was hooked from the beginning! The storyline and character development made it a page turner, but I also found myself slowing down to soak in the educational descriptions contained at the end of each chapter. The dual storylines meshed together seamlessly, and I experienced a range of emotions as the plot unfolded. The vivid descriptions of natural features and beings created clear visualizations of worlds I had never experienced, much less imagined. Very well done!
September 11, 2025
Very different
The book was interesting from the very beginning. Then took a dramatic turn. Loved the Information at the end of each chapter. And the artwork. Enjoyable and exciting read.
The book was interesting from the very beginning. Then took a dramatic turn. Loved the Information at the end of each chapter. And the artwork. Enjoyable and exciting read.
April 23, 2026
4.25⭐️ Metanoia Cave is our ST/TDF Bookclub book for February but as most of us were on the cruise (https://startrekthecruise.com) we put it off until April. I like to do a deep dive and pose questions and get questions from online but there is almost nothing online about this book. It’s self published. It’s most likely published under a pseudonym. I can’t find anything about the author. Sparkling reviews on Goodreads. One review on StoryGraph that suggests the cover art, inside art and possibly even the writing was AI.
I see absolutely zero traces of AI.
Even in the art. I am one of the few of my group that uses AI (or admits to it) and so I can spot it. In art, in writing. I also brought this to the group and (embarrassingly) to my preferred AI. All of whom agreed there is little to no evidence any AI was involved.
That said, I want to do a deep, deep dive so people who can’t find any info can come here and see my crazy detailed thoughts. Just like people have done for others and other books that I’ve benefited from, and my hope is it will make this wonderful book more accessible.
So there will be spoilers later but I will warn you clear in advance. First I’ll start with over all vibes and a review with no spoilers.
Metanoia Cave was one of those books where my reaction changed while I was reading it. The pace was slow, and I didn’t really know where it was going. All I could decipher was we had 2 stories alternated with biology factoids, mostly sea creatures, but there were other animals like cat and dinosaur. The
At the beginning I wasn’t totally sure what kind of story it was going to be, down to the genre. The back of the book blurb suggests thriller. It didn’t feel like a typical thriller, and I wondered if there was going to be any fantastical or science fictiony elements. And was there going to be a love story woven in?
Story line A) Devin, soon to be joined with the science team, Matt & Emma, and the diamond crew (like 6 frat boy dudes).
Storyline B) “flashback” Dave and his whale Nina.
Early on they seem unrelated at first, and I spent a while wondering why flash back story was there. Later it made more sense, but in the beginning I definitely felt like I was still trying to figure out what kind of book I was reading.
One thing I noticed early was how quickly some of the friendships formed between the characters. Devin and Emma especially become close pretty fast. I didn’t dislike their dynamic, actually liked them together, but it happened a little quicker and a smidge forced (for my taste), seemingly. There’s a scene where they get stoned together. This was the part that felt forced but it was fun nonetheless. Lots of late Gen X/early Gen Y Millenial references peppered in to their stoned conversation. Loved those!
Once the expedition portion of the story really gets moving, their friendship started to feel more grounded and believable.
The book really shifted for me once the mystery elements started coming together. That was the point where I stopped feeling like I was waiting for the story to start and realized the earlier sections were setting up something bigger. From there I got much more invested.
The short biology sections scattered through the book seemed unusual at first, but by halfway point they made sense and I felt the intention and connection to the bigger themes, and the story rather than them being random facts dropped in. You gotta wait for it!
Another thing that stood out to me was how the book treats curiosity about… hmmm crazy sciencey things, amazing historical things… differently depending on the characters. Some approach discovery with patience and respect, and others approach it with control or ownership. That contrast runs quietly through the story and becomes more important as things progress. It gets louder towards the end. I mean do you really think the yacht boy playboy rich dude is a good guy, the billionaire with a heart o gold?
Overall this was a book that grew on me as I read it. It started slow, but then about 2/3 in was going at light speed almost so fast that you can’t believe you’re at the end when you’re at the end. And it stayed in my head long after I finished, which is usually the sign that something worked.
🛑 SPOILERS AHEAD ‼️
The novel starts with Devin Allen, a 42-year-old scientist living a stripped-down, semi-retired life in Belize. He is smart, broke, drifting a little, and not especially future-oriented. He has a cat, Mango, and a life that feels intentionally removed from mainstream career ambition.
Alongside Devin’s story is a second storyline about Dave Rodrick, set decades earlier. Dave’s sections revolve around marine research and a whale rescue effort involving a whale named Nina and later Nina’s calf, Pinta. Dave and others become deeply invested in Nina, and the rescue effort becomes a big public cause within the fictional world, almost a pre-social-media version of something going viral online.
The pacing felt a little unusual. The alternating structure between Devin (later joined by Matt and then Emma) and the Dave with Nina the whale and her baby Pinta storyline confused me at first because they didn’t seem connected. I kept wondering:
Why am I reading this separate timeline?
Who is Dave to them?
Is this going to matter later?
Then there was the chapter where the “stalker” turns out to be Mango the cat, which I actually thought was funny and cute once I realized it was intentional misdirection. But I was like whoa okay here comes the crazy thriller part…
The book is structured in repeating pieces:
* present-day storyline
* short biology/nature inserts
* Dave flashback sections
* then another biology insert
At first, the Dave material seems separate from the main plot.
The biology inserts also made the book feel different from a typical thriller, or just different in general. A really original style I’ve not come across. This earns an extra .5 ⭐️ in itself. It almost felt like a science-adventure hybrid instead of straight suspense fiction. At first I wasn’t sure how those pieces connected to the main plot, but later they started to feel thematic instead of random.
1999 Dave eventually frees Nina and Pinta from a net, but he appears to die in the process. Later the book notes that a statue was erected in his honor in 2005. At that point, the flashback storyline seems over, and it still is not yet obvious how it connects to Devin, Emma, Matt, or the expedition. The structure then shifts, dropping the Dave sections and continuing mainly with the present-day plot plus the biology inserts.
2020s Devin is drawn into an expedition through Matt, who is connected to a wealthy Texas oil billionaire funding a mission connected to a legendary diamond. Matt recruits a small science-minded group that includes Emma and Devin. Emma and Devin become close fairly quickly. Their friendship grows through hanging out, talking, watching shows, swimming, and a pre-expedition scene where they get stoned together and bond. Matt, Emma, and Devin become their own little trio.
Separate from them is the more aggressive treasure-hunting side of the expedition, the group I call the diamond crew. Ethan is the major figure there, with a rich entitled vibe and growing jealousy, especially around Emma. Emma and Ethan used to date, they broke up the night before the expedition. Ethan is the antithesis of Devin. He is obsessed with being handsome and rich and thinks he’s a total catch. At one point he tries to embarrass Devin by questioning him about how he can live without a job or a plan, posed as “curiosity (he later gets termed by Emma, of course). Ethan keeps acting possessive throughout the expedition even though they are broken up. The expedition dynamic splits pretty clearly into the science group and the more jockish extraction-minded group.
The expedition moves forward at sea. The diamond crew is using submersibles and equipment to search the ocean floor for the supposed diamond, or more specifically for a safe or container that might hold it, since the diamond itself would not show up on their detectors. The science group is more interested in observation and exploration than treasure hunting.
Only much later in the book Devin, Matt, and Emma come across something astonishing: an underwater volcanic formation with strange tunnels, caverns, and spaces that do not look natural. They find what seems like a hidden internal environment reachable through this bizarre underwater cave system. It is difficult for them to describe, and even their photos and video do not fully capture how strange it is.
The scientist group become fascinated and want more time there. Because the main submersible is needed for the diamond search, the arrangement becomes that the science group can be dropped off with supplies for a few days while the diamond crew continues its own mission and returns later. This gives Devin, Emma, and Matt time to explore further.
Inside this hidden cave environment, things become even stranger. They hear a voice telling them they should not be there. Eventually they encounter a man living inside the cave. He asks what year it is. When he hears it is 2023 and realizes 24 years have passed, it becomes clear that it’s our “flashback” Dave. Hey Dave, yes Ross & Rachel do get back together.
Dave reveals that he did not die after freeing Nina and Pinta. He explains that he was already very sick with cancer at the time of the rescue, physically depleted and unable to save himself even after succeeding in freeing the whales. He blacked out expecting death. Instead, he woke up in the hidden cave system, having been saved by unknown intelligent beings he later named the Sea Nooks.
Once the scientists reached the cave, the book shifted tone in a big way.
Before that point it feels like:
treasure hunt
deep-sea expedition
scientific mystery
After that point it becomes:
first-contact story
hidden ecosystem story
ethical discovery story
The Sea Nooks were indescribable, even “Adams” through Dave, Emma, and Matt had a hard time describing them. I liked that they weren’t just “underwater aliens” but something harder to classify. Not solid, not liquid, not gas, luminous, ancient, intelligent, playful, and selective about which humans they trusted.
We fine out they chose Dave because he saved whales. That was what made the whole story feel intentional instead of accidental.
Dave surviving turned the whale rescue into:
the reason contact happened
the reason he was saved
the reason the Sea Nooks trusted humans at all
And it made the story feel less like coincidence and more like continuity.
Dave explains that these beings are extraordinarily advanced, nonhuman, and unlike anything known to science. They created or maintained a whole hidden environment within the cave, including things that kept him alive and sane, like food (apples, fresh fish in a bucket with a knife) and even a sunroom-like space. They understand him, can communicate in their own way, and seem to have chosen to save him because they witnessed him acting compassionately to rescue another species. They also cured his cancer. (Bee venom biology insert is an example of why these biology inserts work, bee venom apparently has treated some cancers with some success!)
Dave tells the others that most of the Sea Nooks have already moved on according to some larger cycle, but a few remain behind, including a baby. He warns that the hidden place will not remain accessible forever and that they have very little time. The implication is that the Sea Nooks will erase or destroy evidence of the place as they leave.
Devin, Emma, and Matt spend time with Dave and eventually get to encounter the Sea Nooks themselves. They are luminous, difficult to classify physically, and astonishing to behold. They are intelligent, playful, emotionally perceptive, and far more advanced than humans. The science group responds with awe and disbelief, slowly coming to terms with what they are seeing.
Meanwhile, back outside, Ethan has become more unstable. He is jealous of Devin and Emma’s closeness and increasingly possessive and angry. Before leaving the science group in the cave area, Ethan had a motion camera placed. When the diamond crew later retrieves footage, they see evidence of the extraordinary beings. Instead of reacting with wonder and caution the way the scientists did, Ethan and the others quickly shift into an exploitative mindset. They see the creatures as a way to salvage the failed expedition and bring back something even more valuable than the diamond.
Justin is the least awful member of that side of the crew and wants no part of capturing the beings, but Ethan and others push ahead. They bring explosives and decide to force the issue, essentially planning to collapse parts of the cave and trap or capture one of the creatures alive.
This leads to catastrophe.
Explosions collapse parts of the Sea Nooks’ environment. Some of the adult Sea Nooks are crushed. The baby, Perikles, survives because its physical form is less brittle than the adults’. Dave is horrified and devastated. Violence erupts. One of the men from the diamond crew panics and starts shooting. Dave is killed. Devin attacks in defense and is shot. The cave becomes a disaster zone.
The Sea Nooks retaliate as well. One of the violent human attackers is killed in a shocking moment when Perikles implodes his head. The situation spirals. Ethan keeps escalating rather than backing down.
Emma and Matt are forced into survival mode. They find Devin badly wounded. There is not enough oxygen and not enough ability to save everyone as the situation collapses. They are forced to leave Devin behind as the cave and surrounding area become more dangerous.
On the way back, Ethan becomes even more dangerous. He realizes that Justin (who stayed back not wanting to be a part of this crazy plan) is a liability and shoots him too. By this point Ethan has completely cracked. He is obsessed with salvaging proof and escaping blame.
Eventually Ethan gets back to civilization, trying to preserve or transmit the footage that would prove what they found, but the evidence is gone. The footage is gone. His behavior becomes erratic, and he looks increasingly unbelievable.
I interpreted the ending strongly suggests Devin isn’t actually gone, just like Dave wasn’t gone. He’s probably still with them somewhere deeper in the cave system. That made the ending feel hopeful instead of tragic.
The Sea Nooks
luminous
huge
camouflaged with light
not fitting normal physical categories
intelligent
social
long-lived
able to communicate indirectly
And the idea that they pass knowledge through generations genetically was a really cool detail.
My biggest critique: the diamond crew escalated too fast
The scientists continually react to the Sea Nooks with disbelief and awe for days. They keep questioning what they’re seeing.
But the diamond crew watches one camera clip and immediately decides:
these creatures are real
we should capture one
we should use explosives
this solves our failed expedition
I understood why Ethan personally escalated (jealousy, stress, obsession, pressure from the billionaire oil dude), but the rest of the crew accepting the situation instantly felt rushed compared to how carefully the scientists reacted.
The baby Sea Nook surviving when the adults were crushed was one of the most emotional parts of the story for me.
Thank glob for the missing footage ending. Ethan is a mess.
I liked that the evidence disappeared.
It keeps the Sea Nooks hidden.
It protects them from exploitation.
It keeps the mystery alive.
Instead of becoming a world-changing discovery story, it stayed a secret (first?) contact story.
That choice matched the conservation theme running through the entire book.
The final scene with Emma
The lights offshore at the end felt like:
we’re still here
you didn’t imagine it
the connection isn’t over
Especially with Devin’s voice in her head telling her to “embrace the moment.”
That made the ending feel quiet and open instead of final.
Overall thoughts
This book started slower for me than I expected, but once the cave storyline connected with Dave’s past, everything made more sense.
What I liked most:
the ethical discovery theme
the whale rescue connection
the Sea Nooks’ design
the Dave → Devin symmetry
the hidden-world ending
the scientific tone
My biggest critique:
the diamond crew escalation felt rushed compared to the scientists’ reactions, and Devin and Emma’s friendship formed a little faster than I expected early in the story.
But overall the story stuck with me after I finished it, especially the idea that the Sea Nooks choose which humans they trust and why. I ❤️ Sea Nooks.
Hey now. Hey now. Don’t dream it’s over.
4.25⭐️
Here are some bookclub type questions I’ll bring to the discussion next week:
First impressions & reading experience
1. What did you think the book was going to be about when you started it? Did that expectation change as you read?
2. Did the story hook you right away, or did it take time to settle into the tone and structure?
3. How did you feel about the alternating storyline early in the book before it connected more clearly?
4. Did the short science/nature sections add to the story for you, or interrupt it?
Characters & relationships
5. What did you think about how quickly Devin and Emma became close?
6. Did their friendship feel realistic, symbolic, or somewhere in between?
7. Did you read their relationship as romantic, almost-romantic, or intentionally platonic?
8. Which character did you trust the most as a guide through the story and why?
9. Which character’s reaction to discovery felt the most believable to you?
Tone & genre expectations
10. Did the book feel like sci-fi, adventure, environmental fiction, mystery, or something else?
11. Did the story become clearer in direction as it went, or did it stay intentionally mysterious?
12. Was there a moment when the book “clicked” for you?
Curiosity vs. control
13. How do different characters approach discovery differently?
14. Do you think the book is saying something about who should be allowed to make decisions about scientific discoveries?
15. Is curiosity portrayed as positive, dangerous, or both?
Structure & storytelling choices
16. Why do you think the author chose to separate the early storyline instead of presenting it all at once?
17. Did the pacing feel intentional to you, or uneven?
18. Did the book feel like it was building toward something specific, or more like unfolding a layered mystery?
Science, nature, and realism
19. How did the scientific details affect your experience of the story?
20. Did the biology sections make the world feel more believable or more stylized?
21. Did the expedition setting feel immersive and real to you?
Emotional takeaways
22. Did the book feel hopeful, cautionary, or ambiguous by the end?
23. What moment stayed with you after finishing?
24. Did your opinion of the story improve, change, or stay the same as you read?
Big-picture interpretation
25. What do you think the book is really about underneath the expedition storyline?
26. Is this a story about discovery, friendship, responsibility, trust, or something else?
27. Who do you think the book believes is “ready” for discovery and who isn’t?
I see absolutely zero traces of AI.
Even in the art. I am one of the few of my group that uses AI (or admits to it) and so I can spot it. In art, in writing. I also brought this to the group and (embarrassingly) to my preferred AI. All of whom agreed there is little to no evidence any AI was involved.
That said, I want to do a deep, deep dive so people who can’t find any info can come here and see my crazy detailed thoughts. Just like people have done for others and other books that I’ve benefited from, and my hope is it will make this wonderful book more accessible.
So there will be spoilers later but I will warn you clear in advance. First I’ll start with over all vibes and a review with no spoilers.
Metanoia Cave was one of those books where my reaction changed while I was reading it. The pace was slow, and I didn’t really know where it was going. All I could decipher was we had 2 stories alternated with biology factoids, mostly sea creatures, but there were other animals like cat and dinosaur. The
At the beginning I wasn’t totally sure what kind of story it was going to be, down to the genre. The back of the book blurb suggests thriller. It didn’t feel like a typical thriller, and I wondered if there was going to be any fantastical or science fictiony elements. And was there going to be a love story woven in?
Story line A) Devin, soon to be joined with the science team, Matt & Emma, and the diamond crew (like 6 frat boy dudes).
Storyline B) “flashback” Dave and his whale Nina.
Early on they seem unrelated at first, and I spent a while wondering why flash back story was there. Later it made more sense, but in the beginning I definitely felt like I was still trying to figure out what kind of book I was reading.
One thing I noticed early was how quickly some of the friendships formed between the characters. Devin and Emma especially become close pretty fast. I didn’t dislike their dynamic, actually liked them together, but it happened a little quicker and a smidge forced (for my taste), seemingly. There’s a scene where they get stoned together. This was the part that felt forced but it was fun nonetheless. Lots of late Gen X/early Gen Y Millenial references peppered in to their stoned conversation. Loved those!
Once the expedition portion of the story really gets moving, their friendship started to feel more grounded and believable.
The book really shifted for me once the mystery elements started coming together. That was the point where I stopped feeling like I was waiting for the story to start and realized the earlier sections were setting up something bigger. From there I got much more invested.
The short biology sections scattered through the book seemed unusual at first, but by halfway point they made sense and I felt the intention and connection to the bigger themes, and the story rather than them being random facts dropped in. You gotta wait for it!
Another thing that stood out to me was how the book treats curiosity about… hmmm crazy sciencey things, amazing historical things… differently depending on the characters. Some approach discovery with patience and respect, and others approach it with control or ownership. That contrast runs quietly through the story and becomes more important as things progress. It gets louder towards the end. I mean do you really think the yacht boy playboy rich dude is a good guy, the billionaire with a heart o gold?
Overall this was a book that grew on me as I read it. It started slow, but then about 2/3 in was going at light speed almost so fast that you can’t believe you’re at the end when you’re at the end. And it stayed in my head long after I finished, which is usually the sign that something worked.
🛑 SPOILERS AHEAD ‼️
The novel starts with Devin Allen, a 42-year-old scientist living a stripped-down, semi-retired life in Belize. He is smart, broke, drifting a little, and not especially future-oriented. He has a cat, Mango, and a life that feels intentionally removed from mainstream career ambition.
Alongside Devin’s story is a second storyline about Dave Rodrick, set decades earlier. Dave’s sections revolve around marine research and a whale rescue effort involving a whale named Nina and later Nina’s calf, Pinta. Dave and others become deeply invested in Nina, and the rescue effort becomes a big public cause within the fictional world, almost a pre-social-media version of something going viral online.
The pacing felt a little unusual. The alternating structure between Devin (later joined by Matt and then Emma) and the Dave with Nina the whale and her baby Pinta storyline confused me at first because they didn’t seem connected. I kept wondering:
Why am I reading this separate timeline?
Who is Dave to them?
Is this going to matter later?
Then there was the chapter where the “stalker” turns out to be Mango the cat, which I actually thought was funny and cute once I realized it was intentional misdirection. But I was like whoa okay here comes the crazy thriller part…
The book is structured in repeating pieces:
* present-day storyline
* short biology/nature inserts
* Dave flashback sections
* then another biology insert
At first, the Dave material seems separate from the main plot.
The biology inserts also made the book feel different from a typical thriller, or just different in general. A really original style I’ve not come across. This earns an extra .5 ⭐️ in itself. It almost felt like a science-adventure hybrid instead of straight suspense fiction. At first I wasn’t sure how those pieces connected to the main plot, but later they started to feel thematic instead of random.
1999 Dave eventually frees Nina and Pinta from a net, but he appears to die in the process. Later the book notes that a statue was erected in his honor in 2005. At that point, the flashback storyline seems over, and it still is not yet obvious how it connects to Devin, Emma, Matt, or the expedition. The structure then shifts, dropping the Dave sections and continuing mainly with the present-day plot plus the biology inserts.
2020s Devin is drawn into an expedition through Matt, who is connected to a wealthy Texas oil billionaire funding a mission connected to a legendary diamond. Matt recruits a small science-minded group that includes Emma and Devin. Emma and Devin become close fairly quickly. Their friendship grows through hanging out, talking, watching shows, swimming, and a pre-expedition scene where they get stoned together and bond. Matt, Emma, and Devin become their own little trio.
Separate from them is the more aggressive treasure-hunting side of the expedition, the group I call the diamond crew. Ethan is the major figure there, with a rich entitled vibe and growing jealousy, especially around Emma. Emma and Ethan used to date, they broke up the night before the expedition. Ethan is the antithesis of Devin. He is obsessed with being handsome and rich and thinks he’s a total catch. At one point he tries to embarrass Devin by questioning him about how he can live without a job or a plan, posed as “curiosity (he later gets termed by Emma, of course). Ethan keeps acting possessive throughout the expedition even though they are broken up. The expedition dynamic splits pretty clearly into the science group and the more jockish extraction-minded group.
The expedition moves forward at sea. The diamond crew is using submersibles and equipment to search the ocean floor for the supposed diamond, or more specifically for a safe or container that might hold it, since the diamond itself would not show up on their detectors. The science group is more interested in observation and exploration than treasure hunting.
Only much later in the book Devin, Matt, and Emma come across something astonishing: an underwater volcanic formation with strange tunnels, caverns, and spaces that do not look natural. They find what seems like a hidden internal environment reachable through this bizarre underwater cave system. It is difficult for them to describe, and even their photos and video do not fully capture how strange it is.
The scientist group become fascinated and want more time there. Because the main submersible is needed for the diamond search, the arrangement becomes that the science group can be dropped off with supplies for a few days while the diamond crew continues its own mission and returns later. This gives Devin, Emma, and Matt time to explore further.
Inside this hidden cave environment, things become even stranger. They hear a voice telling them they should not be there. Eventually they encounter a man living inside the cave. He asks what year it is. When he hears it is 2023 and realizes 24 years have passed, it becomes clear that it’s our “flashback” Dave. Hey Dave, yes Ross & Rachel do get back together.
Dave reveals that he did not die after freeing Nina and Pinta. He explains that he was already very sick with cancer at the time of the rescue, physically depleted and unable to save himself even after succeeding in freeing the whales. He blacked out expecting death. Instead, he woke up in the hidden cave system, having been saved by unknown intelligent beings he later named the Sea Nooks.
Once the scientists reached the cave, the book shifted tone in a big way.
Before that point it feels like:
treasure hunt
deep-sea expedition
scientific mystery
After that point it becomes:
first-contact story
hidden ecosystem story
ethical discovery story
The Sea Nooks were indescribable, even “Adams” through Dave, Emma, and Matt had a hard time describing them. I liked that they weren’t just “underwater aliens” but something harder to classify. Not solid, not liquid, not gas, luminous, ancient, intelligent, playful, and selective about which humans they trusted.
We fine out they chose Dave because he saved whales. That was what made the whole story feel intentional instead of accidental.
Dave surviving turned the whale rescue into:
the reason contact happened
the reason he was saved
the reason the Sea Nooks trusted humans at all
And it made the story feel less like coincidence and more like continuity.
Dave explains that these beings are extraordinarily advanced, nonhuman, and unlike anything known to science. They created or maintained a whole hidden environment within the cave, including things that kept him alive and sane, like food (apples, fresh fish in a bucket with a knife) and even a sunroom-like space. They understand him, can communicate in their own way, and seem to have chosen to save him because they witnessed him acting compassionately to rescue another species. They also cured his cancer. (Bee venom biology insert is an example of why these biology inserts work, bee venom apparently has treated some cancers with some success!)
Dave tells the others that most of the Sea Nooks have already moved on according to some larger cycle, but a few remain behind, including a baby. He warns that the hidden place will not remain accessible forever and that they have very little time. The implication is that the Sea Nooks will erase or destroy evidence of the place as they leave.
Devin, Emma, and Matt spend time with Dave and eventually get to encounter the Sea Nooks themselves. They are luminous, difficult to classify physically, and astonishing to behold. They are intelligent, playful, emotionally perceptive, and far more advanced than humans. The science group responds with awe and disbelief, slowly coming to terms with what they are seeing.
Meanwhile, back outside, Ethan has become more unstable. He is jealous of Devin and Emma’s closeness and increasingly possessive and angry. Before leaving the science group in the cave area, Ethan had a motion camera placed. When the diamond crew later retrieves footage, they see evidence of the extraordinary beings. Instead of reacting with wonder and caution the way the scientists did, Ethan and the others quickly shift into an exploitative mindset. They see the creatures as a way to salvage the failed expedition and bring back something even more valuable than the diamond.
Justin is the least awful member of that side of the crew and wants no part of capturing the beings, but Ethan and others push ahead. They bring explosives and decide to force the issue, essentially planning to collapse parts of the cave and trap or capture one of the creatures alive.
This leads to catastrophe.
Explosions collapse parts of the Sea Nooks’ environment. Some of the adult Sea Nooks are crushed. The baby, Perikles, survives because its physical form is less brittle than the adults’. Dave is horrified and devastated. Violence erupts. One of the men from the diamond crew panics and starts shooting. Dave is killed. Devin attacks in defense and is shot. The cave becomes a disaster zone.
The Sea Nooks retaliate as well. One of the violent human attackers is killed in a shocking moment when Perikles implodes his head. The situation spirals. Ethan keeps escalating rather than backing down.
Emma and Matt are forced into survival mode. They find Devin badly wounded. There is not enough oxygen and not enough ability to save everyone as the situation collapses. They are forced to leave Devin behind as the cave and surrounding area become more dangerous.
On the way back, Ethan becomes even more dangerous. He realizes that Justin (who stayed back not wanting to be a part of this crazy plan) is a liability and shoots him too. By this point Ethan has completely cracked. He is obsessed with salvaging proof and escaping blame.
Eventually Ethan gets back to civilization, trying to preserve or transmit the footage that would prove what they found, but the evidence is gone. The footage is gone. His behavior becomes erratic, and he looks increasingly unbelievable.
I interpreted the ending strongly suggests Devin isn’t actually gone, just like Dave wasn’t gone. He’s probably still with them somewhere deeper in the cave system. That made the ending feel hopeful instead of tragic.
The Sea Nooks
luminous
huge
camouflaged with light
not fitting normal physical categories
intelligent
social
long-lived
able to communicate indirectly
And the idea that they pass knowledge through generations genetically was a really cool detail.
My biggest critique: the diamond crew escalated too fast
The scientists continually react to the Sea Nooks with disbelief and awe for days. They keep questioning what they’re seeing.
But the diamond crew watches one camera clip and immediately decides:
these creatures are real
we should capture one
we should use explosives
this solves our failed expedition
I understood why Ethan personally escalated (jealousy, stress, obsession, pressure from the billionaire oil dude), but the rest of the crew accepting the situation instantly felt rushed compared to how carefully the scientists reacted.
The baby Sea Nook surviving when the adults were crushed was one of the most emotional parts of the story for me.
Thank glob for the missing footage ending. Ethan is a mess.
I liked that the evidence disappeared.
It keeps the Sea Nooks hidden.
It protects them from exploitation.
It keeps the mystery alive.
Instead of becoming a world-changing discovery story, it stayed a secret (first?) contact story.
That choice matched the conservation theme running through the entire book.
The final scene with Emma
The lights offshore at the end felt like:
we’re still here
you didn’t imagine it
the connection isn’t over
Especially with Devin’s voice in her head telling her to “embrace the moment.”
That made the ending feel quiet and open instead of final.
Overall thoughts
This book started slower for me than I expected, but once the cave storyline connected with Dave’s past, everything made more sense.
What I liked most:
the ethical discovery theme
the whale rescue connection
the Sea Nooks’ design
the Dave → Devin symmetry
the hidden-world ending
the scientific tone
My biggest critique:
the diamond crew escalation felt rushed compared to the scientists’ reactions, and Devin and Emma’s friendship formed a little faster than I expected early in the story.
But overall the story stuck with me after I finished it, especially the idea that the Sea Nooks choose which humans they trust and why. I ❤️ Sea Nooks.
Hey now. Hey now. Don’t dream it’s over.
4.25⭐️
Here are some bookclub type questions I’ll bring to the discussion next week:
First impressions & reading experience
1. What did you think the book was going to be about when you started it? Did that expectation change as you read?
2. Did the story hook you right away, or did it take time to settle into the tone and structure?
3. How did you feel about the alternating storyline early in the book before it connected more clearly?
4. Did the short science/nature sections add to the story for you, or interrupt it?
Characters & relationships
5. What did you think about how quickly Devin and Emma became close?
6. Did their friendship feel realistic, symbolic, or somewhere in between?
7. Did you read their relationship as romantic, almost-romantic, or intentionally platonic?
8. Which character did you trust the most as a guide through the story and why?
9. Which character’s reaction to discovery felt the most believable to you?
Tone & genre expectations
10. Did the book feel like sci-fi, adventure, environmental fiction, mystery, or something else?
11. Did the story become clearer in direction as it went, or did it stay intentionally mysterious?
12. Was there a moment when the book “clicked” for you?
Curiosity vs. control
13. How do different characters approach discovery differently?
14. Do you think the book is saying something about who should be allowed to make decisions about scientific discoveries?
15. Is curiosity portrayed as positive, dangerous, or both?
Structure & storytelling choices
16. Why do you think the author chose to separate the early storyline instead of presenting it all at once?
17. Did the pacing feel intentional to you, or uneven?
18. Did the book feel like it was building toward something specific, or more like unfolding a layered mystery?
Science, nature, and realism
19. How did the scientific details affect your experience of the story?
20. Did the biology sections make the world feel more believable or more stylized?
21. Did the expedition setting feel immersive and real to you?
Emotional takeaways
22. Did the book feel hopeful, cautionary, or ambiguous by the end?
23. What moment stayed with you after finishing?
24. Did your opinion of the story improve, change, or stay the same as you read?
Big-picture interpretation
25. What do you think the book is really about underneath the expedition storyline?
26. Is this a story about discovery, friendship, responsibility, trust, or something else?
27. Who do you think the book believes is “ready” for discovery and who isn’t?
October 16, 2025
For most of us the oceans are a mystery and like space exploration we want to vicariously follow those who challenge both enigmas with the hopes of unraveling the long held secrets of the universe. Ken Adams does this with a writing style that is at once both extremely entertaining and believe it or not as an added bonus is educational. Sprinkled throughout the fast paced story that intertwines deep ocean exploration with a story line that could be Patterson or Connelly or your favorite action writer, are tidbits of ocean science done as an aside and as part of the book.(I know as I thought initially that the tidbits were the imagination of the author added to create more interest but the researcher in me made me follow the bread crumbs on several and yes all were real- imagine that!) For you who enjoy a good action book you are not forgotten. Plenty of good guys and bad guys to create an engaging story, The characters are well developed and very diverse. and not all are as they seem. You will not be bored at any point and you may as I did come away with more questions about are we really alone on our planet much less in the universe!
This was a fun read and well thought out and developed. I will be waiting for Ken's next foray into the world of inner space or outer space.
I received a free copy of this book and am voluntarily leaving a review.
This was a fun read and well thought out and developed. I will be waiting for Ken's next foray into the world of inner space or outer space.
I received a free copy of this book and am voluntarily leaving a review.
February 22, 2026
This book has it all! It made me laugh, cry, and kept me on the edge of my seat the whole time. It takes you into the their world and you feel you're right in the caves with them.
Very unique storyline!
I don't read a lot, but I didn't want to put this book down. I was on vacation in Aruba and still wanted to keep reading it once I got off of the plane.
Adams incorporated true science into it as well, which is a bonus. The facts you learn pertain to the upcoming chapters, such a fun and new way to write. The ending is very powerful and unpredictable. An absolutely great read!!
Very unique storyline!
I don't read a lot, but I didn't want to put this book down. I was on vacation in Aruba and still wanted to keep reading it once I got off of the plane.
Adams incorporated true science into it as well, which is a bonus. The facts you learn pertain to the upcoming chapters, such a fun and new way to write. The ending is very powerful and unpredictable. An absolutely great read!!
October 24, 2025
This book had me hooked from the moment I opened it. The book had great character development, was suspenseful, full of surprises, had descriptive imagery, and made me feel a range of emotions. I even laughed out loud a few times. I felt like I was experiencing this adventure alongside the characters. Definitely worth the read. I ordered extra copies for Christmas gifts.
January 28, 2026
ugh i really liked this book but there are some aspects that definitely made me cringe. when i entered the giveaway (thank you btw to the sponsors), i thought the cover resembled AI “art” and was turned off, but i decided to still submit an entry. unfortunately, i was reaffirmed of my disappointment when i opened the book only to see each picture was obviously AI-generated. this use of AI for the pictures made me think significantly less of the book, and even has me question the credibility of this book’s writing. in addition, i thought the emphasis put on emma’s beauty was a tad weird at times, especially when there were conversations between how young she was and her potential love interest’s age. it just made me a little uncomfortable i guess? besides those components, i did really enjoy the book and i liked the fantastical descriptions. i think some of the stuff at the beginning could have been excised and i couldn’t follow exactly what the creatures were supposed to look like. i did really like that the author’s picture is a cat.
January 13, 2026
it took quite awhile to get into the story,but once there it was extremely good. So many ocean animal details. Devin goes on an ocean expedition and the rest pulls you in. How do the people,especially Emma connect?
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