From the #1 New York Times bestselling master of suspense comes a riveting thriller that probes the deepest terrors of the human psyche—and the ineffable mystery of what truly makes us who we are. Here a brilliant young man finds himself fighting for his very existence in a battle that starts with the most frightening words of all…
At thirty-four, Internet entrepreneur Ryan Perry seemed to have the world in his pocket—until the first troubling symptoms appeared out of nowhere.