The sixth volume of the Jack Daniels series begins with a funeral. As Lieutenant Jacqueline "Jack" Daniels stands at the grave with tears in her eyes, her phone rings. It's Kork, the murderer who has escaped from forensic psychiatry. The psychopath not only randomly kills innocent people but has set her sights primarily on Jack. She taunts Jack and pulls her deeper into a twisted game of cat and mouse. But which of the two women craves revenge more? "The Arch-Enemies" is J.A. Konrath's most gripping novel yet, filled with unexpected twists that keep the reader on the edge of their seat.