Considered an expert in the area of psychopathic behavior, Dr. Espy has interviewed more than 30 serial murderers throughout the world including Jeffrey Dahmer and Ted Bundy. But when he was assigned to be the lead evaluator for Montana State Prison inmate Nathaneal Bar Jonah, an already once convicted serial child molester and attempted murderer in Massachusetts, Espy encountered a parasitic personality beyond imagination: a modern-day Cronos, the Greek mythological figure who devoured his children. Weighing over 375 pounds, Bar Jonah worked as a short order cook at Hardy's, carried a stun gun, impersonated police officers, told masterful lies, wrote unbreakable codes, cooked and shared with friends strange-tasting chili and spaghetti sauces, and was thought by Montana State detectives to have murdered and cannibalized at least one victim, 10-year-old Zach Ramsay. Culled from hundreds of hours of exclusive interviews with Bar Jonah, dozens of others who either knew or were involved with him, Montana State investigators and prosecutors, and Zach Ramsay's mother, Espy retells Bar Jonah's entire life-from the time before he was conceived to after his death-and those who were harmed by him in unparalleled detail and scope.