The Helix Project Thriller Series

DoubleHelix (The Helix Project Book 1) FREE by J.L. Calder: When his obsession with a woman's murder drags Mike Green into the shadows of espionage, politics, and power, he learns the truth is never safe—and survival is never guaranteed. From the backrooms of Washington power to the shadows of post-Soviet Kiev, DoubleHelix is a twisting descent into lies, loyalty, and the cost of uncovering the wrong truth.

This book is Free on July 2, 2026