ENTER THE WORLD OF
MEET THE FLAGSHIP SERIES THAT PUTS READERS IN THE CROSSHAIRS OF ESPIONAGE, AMBITION & BETRAYAL.
DOUBLEHELIX
BOOK ONE IN THE HELIX PROJECT
DoubleHelix is where the bullet is chambered.
"Dark, thoughtful, and tense, DoubleHelix is a striking debut in an ambitious thriller series. A noir-soaked political thriller where obsession, buried intelligence, and loyalty collide in post-Cold War Washington" —NewInBooks.com
WASHINGTON D.C. - 1996
Mike Green has built a career writing about dead girls, but nothing could have prepared him for the file he stumbles on at the National Archives: the death of Delilah Grennan, a murdered Soviet dissident with ties to the Russian underworld. What begins as research becomes obsession, until her voice bleeds into his and paranoia pushes him deeper into the shadows.
Dragged into a covert war between a global crime syndicate, intelligence agencies, and a political dynasty that considers him family, Mike learns too late that the only way to survive is sometimes to be buried.
In the shadows of power, survival is never guaranteed.
Dark, suspenseful, and razor-sharp, Double Helix blends the psychological intensity of a suspense thriller with the intrigue of an espionage novel.
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! - AudioBookFanatic
The book excels at political intrigue...The climax is a brutal and visceral payoff.-- Printed Word Reviews
Truth here isn't heroic - it burns everything it touches. This book throws you straight into that fire. No clean exits. Just consequences." --Booksterr
BINDING COIL
BOOK TWO IN THE HELIX PROJECT
Binding Coil is where the scope widens.
"Calder’s ability to weave complex characters into a web of intense action and shadowy political dealings makes this a must-read for fans of contemporary thrillers. While it draws on the intriguing plot introduced in the first book, this novel stands firmly on its own as a fast-paced, action-packed story filled with unexpected twists and turns." - Stacie Hearne, Author's Reading.
LOS ANGELES - 2001
Mike Green thought he’d left covert politics behind and built a new life. But when that new life collides with a mission under Tony McCollister's command, the threads that once only connected them now inextricably bind them together.
From Washington's secret black ops to the gritty streets of Los Angeles, both men find themselves fracturing under the truth while trying to preserve the lie.
Inside the coil of betrayal, loyalty is weaponized long before it's tested.
And the real battle is protecting life from a system designed to erase it.
Calder's ability to weave complex characters into a web of intense action and shadowy political dealings makes this a must-read for fans of contemporary thrillers - AuthorsReading
A masterclass in high-stakes tension...This sequel is everything I wanted and more. I thought the first book was intense, but Binding Coil takes the Helix Project to a whole new level. - Real Amazon Reviewer
TERMINAL SPIRAL
BOOK THREE IN THE HELIX PROJECT
The Helix Project puts readers in the crosshairs of espionage, ambition, and betrayal.
Terminal Spiral is where the shot lands.
"Calder’s Terminal Spiral is a masterclass in high-stakes suspense, seamlessly blending the grit of a police procedural with the shadow-drenched maneuvers of a political thriller...a high-octane collision of street-level grit and deep-state deception where the price of family survival is the complete erasure of the self." - PenCraft
LOS ANGELES - 2002
Mike Grennan is still a target on a cartel kill list—but this time, everyone around him is deemed collateral. And when the threat closes in on his daughter, it’s no longer about justice; it’s about family.
As compromised agencies collide with covert operations designed to erase evidence and people alike, Grennan, his new partner Annie Diamond, and Tony McCollister find themselves trapped on opposite sides of a system that no longer negotiates.
Loyalty becomes liability. Protection becomes exposure. And every decision tightens the spiral toward a reckoning no one fully controls.
When devotion comes due, everyone pays.
Terminal Spiral is a masterclass in high-stakes suspense, seamlessly blending the grit of a police procedural with the shadow-drenched maneuvers of a political thriller... PenCraft
Annie and Mike share the kind of bond that's hard to name: funny one minute, loaded the next, built on equal parts trust and things left unsaid. Their back-and-forth is easily the best thing in the book. Calder clearly loves writing these two together, and it shows. - Real Reviewer