A scientist and a soldier must join forces when combat drones zero in on targets on American soil in this gripping technological thriller from New York Times bestselling author Daniel Suarez. Linda McKinney studies the social behavior of insects—which leaves her entirely unprepared for the day her research is conscripted to help run an unmanned and automated drone army. Odin is the secretive Special Ops soldier with a unique insight into a faceless enemy who has begun to attack the American homeland with drones programmed to seek, identify, and execute targets without human intervention. Together, McKinney and Odin must slow this advance long enough for the world to recognize its destructive power. But as enigmatic forces press the advantage, and death rains down from above, it may already be too late to save mankind from destruction.