FBI Agent Jeff Rinek, well-known for a number of high-profile investigations, including the Unabomber, the kidnapping of Jaycee Dugard, and the Yosemite Park murders committed by a serial killer named Cary Stayner deeply personal account of what it's like to work cases when a missing child's life hangs in the balance or when a serial child killer must be identified and stopped before he kills again.