An Amazon Editor’s Pick for Best Books of the Month. After a mysterious event, six strangers wake up in an underground bunker. They don’t know how much time has passed. Or where the bunker is located. They seem to be part of a vast scientific experiment aimed at restarting the human race after a global catastrophe—a program called The Extinction Trials. What they don’t realize is that The Extinction Trials hides a secret. And so does the world outside. From the bestselling author of Departure and Winter World , comes an epic standalone novel with a twist you’ll never forget. Praise for A.G. Riddle …reads like a superior collaboration between Dan Brown and Michael Crichton. — The Guardian on Pandemic I finished the book fast because I just couldn’t wait… — WIRED GeekDad on Departure Riddle… keep(s) the focus on his characters… rather than the technological marvels — Publisher’s Weekly on Departure This is apocalyptic sci-fi at its best. — Daily Mail on The Solar War Well-constructed and tightly-wound as a fine Swiss watch—DEPARTURE has non-stop action, an engaging plot and, of course, wheels within wheels. — Diana Gabaldon , #1 New York Times bestselling author of Outlander Don’t miss A.G. Riddle’s newest novel— Lost in Time. On pre-order now.