A New York Times Bestseller, A #1 Indie Next Pick -- First, the unthinkable: a security breach at a secret U.S. government facility unleashes the monstrous product of a chilling military experiment. Then, the unspeakable: a night of chaos and carnage gives way to sunrise on a world forever altered. As civilization crumbles into a primal landscape of predators and prey, two people flee: FBI agent Brad Wolgast, a good but haunted man; and six-year-old orphan Amy Harper Bellafonte, a refugee from the doomed project.