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DoubleHelix: Book One in The Helix Project :
In the shadows of power, survival is never guaranteed.
Washington, D.C., 1996. - Mike Green built a career writing about dead girls, but nothing could have prepared him for finding a redacted intelligence file surrounding the death of Delilah Grennan, a murdered Soviet dissident with ties to the Russian underworld. What begins as a quest for his next story spirals into obsession, until her voice bleeds into his and paranoia pushes him deeper into the shadows of a global conspiracy.
Can Mike unravel the truth before he becomes the next target in this chambered bullet aimed at the heart of power?
DOUBLEHELIX delivers the grit of classic noir crime fiction while thrusting readers into a post-Cold War spy thriller. Perfect for those craving action-packed crime suspense with layers of dark psychological suspense.
A must-read mystery thriller novel blending psychological suspense with political thriller fiction.For fans of spy thrillers, espionage novels, and detective mysteries with twists.Explore themes of loyalty, identity, and the ultimate cost of power
Washington, D.C., 1996. - Mike Green built a career writing about dead girls, but nothing could have prepared him for finding a redacted intelligence file surrounding the death of Delilah Grennan, a murdered Soviet dissident with ties to the Russian underworld. What begins as a quest for his next story spirals into obsession, until her voice bleeds into his and paranoia pushes him deeper into the shadows of a global conspiracy.
Can Mike unravel the truth before he becomes the next target in this chambered bullet aimed at the heart of power?
DOUBLEHELIX delivers the grit of classic noir crime fiction while thrusting readers into a post-Cold War spy thriller. Perfect for those craving action-packed crime suspense with layers of dark psychological suspense.
A must-read mystery thriller novel blending psychological suspense with political thriller fiction.For fans of spy thrillers, espionage novels, and detective mysteries with twists.Explore themes of loyalty, identity, and the ultimate cost of power
389 pages, Kindle Edition
Published November 24, 2025
5 people are currently reading
25 people want to read
About the author
J.L. Calder
4 books1 followerDownload a Free Book Here: https://dl.bookfunnel.com/39edn3v5kt
I can remember picking up a pen for the first time as the Berlin Wall fell, aware then that the event would define a generation. Raw, human and layered with mysterious intrigue - that's where I wanted to play.
A degree in English Literature from UCLA followed, with a concentration in military and espionage fiction shaped by the tendency to pick electives featuring guest professors like David Mamet, and a graduation thesis titled "James Bond's role in shaping the Lexicon of Espionage".
With three decades in film production as a "day job" I take a cinematic eye to the page — along with a healthy disregard for taking creative notes.
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Displaying 1 - 11 of 11 reviews
December 9, 2025
4.5⭐️
DoubleHelix is an atmospheric espionage thriller with an intricate mystery and political noir. There’s also a compelling story-within-a-story set against a backdrop of the Soviet Cold War era and puzzling archives that make the book an addictive read that gets more intricate with every chapter!
The story follows mystery author Mike Green in Washington, D.C., 1996, who, while doing research for his novel, stumbles upon a file at the National Archives: the case of Delilah Grennan, a murdered Soviet dissident with ties to the Russian underworld. What begins as curiosity spirals into an obsession, and soon Mike finds himself entangled in a dangerous war between crime syndicates, intelligence agencies, and a political dynasty that sees him as family!
The story is mostly told from Mike’s POV but also switches to Delilah (when Mike’s reading her book) and other complex/morally grey characters that will keep readers constantly engaged! Delilah’s chapters are in a past timeline, detailing her complicated family/romantic life, all of which is at risk from Russian espionage—and it’s a detailed recount leading all the way up to her death. Meanwhile, Mike’s POV is the heart of the story—he’s highly intelligent, flawed, and compelling, and also haunted by a mysterious past. As the story unfolds, Mike shifts from the curious writer to a man consumed by guilt, paranoia, and a need for truth. His communication with Delilah, even though she’s deceased, is a fascinating and engrossing part of the story—is he hallucinating, speaking with her ghost, or being sent messages from beyond?? Every interaction between them gives more clues about her mysterious death and the impending danger to Mike!
Mike’s other close relationships in the story are all well developed and layered—from his politically opposite girlfriend to his drug-addict best friend, who’s the son of his surrogate political dynasty family, there are intricacies, suspicious motives, and red flags everywhere that will keep readers guessing!
The story’s pacing is one of the novel’s strongest suits. The early chapters immediately draw readers in with Mike’s compelling backstory, his archival research, and his complex relationships. As Mike’s curiosity about Delilah’s story becomes an all-consuming obsession, the story picks up pace and becomes so much more intricate. If listening on audio, it’s recommended to listen at a slower pace to avoid missing any key clues or details, especially in Delilah’s past timeline chapters! By the midpoint readers will be hooked and emotionally invested in Mike’s outcome, as dangerous secrets and conspiracies unravel, and the tension builds to an almost unbearable level! The climax includes a high-stakes confrontation, and the fallout has so much to offer—betrayals, consequences, and reveals—that will have readers’ heads spinning! The epilogue is short and open-ended but also hints at future dangers—and perfectly sets up for a compelling sequel that readers will be eager for!
Overall, DoubleHelix is a complex, addictive thriller that’s perfect for readers who love spy thrillers with morally ambiguous characters, political conspiracies, and stories with lots of psychological suspense! It’s also a very strong start to a series—there’s not much to find fault with here, and, most importantly, the protagonist is memorable and someone who readers will want to continue reading about! Anyone looking for an intricate, multi-POV thriller that will get their inner detective wheels turning and that lingers after the final page should add this one to their immediate reading list!
DoubleHelix is an atmospheric espionage thriller with an intricate mystery and political noir. There’s also a compelling story-within-a-story set against a backdrop of the Soviet Cold War era and puzzling archives that make the book an addictive read that gets more intricate with every chapter!
The story follows mystery author Mike Green in Washington, D.C., 1996, who, while doing research for his novel, stumbles upon a file at the National Archives: the case of Delilah Grennan, a murdered Soviet dissident with ties to the Russian underworld. What begins as curiosity spirals into an obsession, and soon Mike finds himself entangled in a dangerous war between crime syndicates, intelligence agencies, and a political dynasty that sees him as family!
The story is mostly told from Mike’s POV but also switches to Delilah (when Mike’s reading her book) and other complex/morally grey characters that will keep readers constantly engaged! Delilah’s chapters are in a past timeline, detailing her complicated family/romantic life, all of which is at risk from Russian espionage—and it’s a detailed recount leading all the way up to her death. Meanwhile, Mike’s POV is the heart of the story—he’s highly intelligent, flawed, and compelling, and also haunted by a mysterious past. As the story unfolds, Mike shifts from the curious writer to a man consumed by guilt, paranoia, and a need for truth. His communication with Delilah, even though she’s deceased, is a fascinating and engrossing part of the story—is he hallucinating, speaking with her ghost, or being sent messages from beyond?? Every interaction between them gives more clues about her mysterious death and the impending danger to Mike!
Mike’s other close relationships in the story are all well developed and layered—from his politically opposite girlfriend to his drug-addict best friend, who’s the son of his surrogate political dynasty family, there are intricacies, suspicious motives, and red flags everywhere that will keep readers guessing!
The story’s pacing is one of the novel’s strongest suits. The early chapters immediately draw readers in with Mike’s compelling backstory, his archival research, and his complex relationships. As Mike’s curiosity about Delilah’s story becomes an all-consuming obsession, the story picks up pace and becomes so much more intricate. If listening on audio, it’s recommended to listen at a slower pace to avoid missing any key clues or details, especially in Delilah’s past timeline chapters! By the midpoint readers will be hooked and emotionally invested in Mike’s outcome, as dangerous secrets and conspiracies unravel, and the tension builds to an almost unbearable level! The climax includes a high-stakes confrontation, and the fallout has so much to offer—betrayals, consequences, and reveals—that will have readers’ heads spinning! The epilogue is short and open-ended but also hints at future dangers—and perfectly sets up for a compelling sequel that readers will be eager for!
Overall, DoubleHelix is a complex, addictive thriller that’s perfect for readers who love spy thrillers with morally ambiguous characters, political conspiracies, and stories with lots of psychological suspense! It’s also a very strong start to a series—there’s not much to find fault with here, and, most importantly, the protagonist is memorable and someone who readers will want to continue reading about! Anyone looking for an intricate, multi-POV thriller that will get their inner detective wheels turning and that lingers after the final page should add this one to their immediate reading list!
November 21, 2025
I received an ARC through "Booksirens" and I am voluntarily leaving an honest review.
This is a story about Mike Green who upon reading a file from the National Archives, initiated a journey that he didn't expect. The file brought his attention to the mention of Sen. Richard Stockton who was the father of his friend Tom. Mike is an author of detective stories and he uses info he finds at the Archives in developing his plots for his stories. In this instance, he begins to look into the background of Delilah Grennan who was the subject of the file. He was able to find two books that she had written and as he got more into it, he eventually was completely wrapped up in it and he eventually wound up going to the orphanage where he was placed after being born. He discovered his birth certificate and then decided to look up and see if his father was still alive. This brought him first to Germany and then finally Ukraine where he met his father. He also made another stop which led him to being abducted.
Read along with Mike as he learns the story of Delilah and how he was convinced that he needed to get a better understanding of this person. Find who he went to Germany with as well as Ukraine and what event he was involved in. The ending is one that you would expect.
This story will definitely keep your interest, get the book now, you won't be disappointed!
This is a story about Mike Green who upon reading a file from the National Archives, initiated a journey that he didn't expect. The file brought his attention to the mention of Sen. Richard Stockton who was the father of his friend Tom. Mike is an author of detective stories and he uses info he finds at the Archives in developing his plots for his stories. In this instance, he begins to look into the background of Delilah Grennan who was the subject of the file. He was able to find two books that she had written and as he got more into it, he eventually was completely wrapped up in it and he eventually wound up going to the orphanage where he was placed after being born. He discovered his birth certificate and then decided to look up and see if his father was still alive. This brought him first to Germany and then finally Ukraine where he met his father. He also made another stop which led him to being abducted.
Read along with Mike as he learns the story of Delilah and how he was convinced that he needed to get a better understanding of this person. Find who he went to Germany with as well as Ukraine and what event he was involved in. The ending is one that you would expect.
This story will definitely keep your interest, get the book now, you won't be disappointed!
December 31, 2025
"DoubleHelix" introduces us to Mike Green, a hard-boiled detective writer navigating the complexities of his personal and professional life. Set against a backdrop of political intrigue and personal demons, the narrative intertwines crime, identity, and the search for truth.
Mike is a relatable protagonist, grappling with addiction and the weight of his past. His internal struggles add layers to the story. The unfolding mystery surrounding Delilah Grennan's murder keeps readers hooked. The blend of real-world political elements with fiction creates a compelling narrative. Calder's descriptive style vividly brings D.C. to life, enhancing the feel of the story. At times, the narrative can feel a bit slow, especially during introspective moments. A tighter focus on the plot could enhance the overall tension. While Mike's character is well-developed, some secondary characters could use more depth to enrich the story further. "DoubleHelix" is a gripping read for fans of detective fiction and political thrillers. With a strong protagonist and an intriguing plot, it sets the stage for an exciting series. If you enjoy stories that blend personal struggle with suspense, this book is definitely worth picking up! I would absolutely recommend this book!
Mike is a relatable protagonist, grappling with addiction and the weight of his past. His internal struggles add layers to the story. The unfolding mystery surrounding Delilah Grennan's murder keeps readers hooked. The blend of real-world political elements with fiction creates a compelling narrative. Calder's descriptive style vividly brings D.C. to life, enhancing the feel of the story. At times, the narrative can feel a bit slow, especially during introspective moments. A tighter focus on the plot could enhance the overall tension. While Mike's character is well-developed, some secondary characters could use more depth to enrich the story further. "DoubleHelix" is a gripping read for fans of detective fiction and political thrillers. With a strong protagonist and an intriguing plot, it sets the stage for an exciting series. If you enjoy stories that blend personal struggle with suspense, this book is definitely worth picking up! I would absolutely recommend this book!
December 11, 2025
Double Helix is J.L. Calder's first instalment in the Helix Project. A slow burn, the pace was just too agonizing, and the plot scraped by slowly, seldom picking up pace. Unlike typical thrillers, the chapter endings were dull.
I received a free copy of this book via Booksprout and am voluntarily leaving a review. While I feel there is a lot of room for improvement, I really liked the plot surrounding the death of Delilah Grennan, and I only wish that there was a little more focus on that political angle than the lavish attention showered on Senator Richard Stockton and his family/cronies.
I also found glaring typos, which I am reporting to the publisher, in what is probably my only and best possible & earnest effort to help contribute to the book's success. I also wish I did not have to endure the 89 instances of the F-word and other colorful expletives throughout the book.
I received a free copy of this book via Booksprout and am voluntarily leaving a review. While I feel there is a lot of room for improvement, I really liked the plot surrounding the death of Delilah Grennan, and I only wish that there was a little more focus on that political angle than the lavish attention showered on Senator Richard Stockton and his family/cronies.
I also found glaring typos, which I am reporting to the publisher, in what is probably my only and best possible & earnest effort to help contribute to the book's success. I also wish I did not have to endure the 89 instances of the F-word and other colorful expletives throughout the book.
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December 16, 2025The synopsis I saw on Booktrovert via NetGalley intrigued me. I'm glad that I claimed and read this book.
Mike Green is best friends with the son of a US Senator running for the position of US President. Mike is an author who is behind schedule for the next book in an ongoing series. He has a bout of writer's block and his remedy for this produces unforeseen circumstances.
I love all the wonderful twists and turns the book takes the reader on. I look forward to reading the next book in the series.
Mike Green is best friends with the son of a US Senator running for the position of US President. Mike is an author who is behind schedule for the next book in an ongoing series. He has a bout of writer's block and his remedy for this produces unforeseen circumstances.
I love all the wonderful twists and turns the book takes the reader on. I look forward to reading the next book in the series.
December 25, 2025
I received a copy of this book through Booktrovert. I received no compensation for this review.
The description of this book is ambitious: noir crime fiction, spy thriller, action-packed and dark psychological suspense. Turns out, it's too ambitious for one volume. Sadly, this feels like a hash as it veers quite suddenly from almost-parody noir to a buddy drama with a pair of young men both traumatized by their respective origin stories to a somewhat incomprehensible spy chase through Ukraine. Pick one, and do it well; don't throw them all in the blender.
The description of this book is ambitious: noir crime fiction, spy thriller, action-packed and dark psychological suspense. Turns out, it's too ambitious for one volume. Sadly, this feels like a hash as it veers quite suddenly from almost-parody noir to a buddy drama with a pair of young men both traumatized by their respective origin stories to a somewhat incomprehensible spy chase through Ukraine. Pick one, and do it well; don't throw them all in the blender.
January 30, 2026
I think I'm going to have to quit this one. I REALLY didn't care for it. The glacial pace, the boring characters and plot, the poor writing... this just isn't the book for me! I feel bad for quitting, but this is just really not good! All the drugs and drinking got to me, too. I don't think characters have to be likable in order for me to like a book, but I have to feel SOMETHING. These ones were so boring.
Thank you to NetGalley for the free review copy.
Thank you to NetGalley for the free review copy.
February 20, 2026
(2 1/2). This is an interesting little book. A nice intersection of -what the hell is going on and boy, this is big fun. Mike Green is a train wreck of a fun protagonist. I cannot even begin to list all his good and bad qualities, but I sure did like him. As I said, this story is all over the place but it mostly hangs together. Either way, it certainly was an easy read and I may even seek out the second in the series. Pretty good stuff.
December 8, 2025
Fascinating premise that twins can affect one another even when one is deceased! A fast read, and lots of twists and turns. Highly recommend.
December 16, 2025
Extremely action packed mystery. So much going on at times I got quite confused.
January 25, 2026
Burned out drug addicted writer Mike Green stumbles on a story about Soviet dissident Delilah Grennan. Mix in his best friends Tom Stockton son of the President and this becomes a well thought out thriller mixed with global crime and political scams!
Thank you NetGalley and Douglas Street Press for the ARC! My unbiased opinion is to highly recommend this book!
#thrillerbooks #NetGalley #doublehelix
Thank you NetGalley and Douglas Street Press for the ARC! My unbiased opinion is to highly recommend this book!
#thrillerbooks #NetGalley #doublehelix
Displaying 1 - 11 of 11 reviews