An authority on serial killers wrestles with an unspeakable secret. A puzzle writer is caught in a terrifying game to the death. A madman thirsts for revenge--and reckoning. In State of Mind, John Katzenbach turns these elements into a pulse-pounding ride of nonstop action and psychological suspense.A professor of abnormal psychology, Jeffrey Clayton struggles with a dark past. Twenty-five years before, Jeffrey and his mother and sister fled his tyrannical father--a man who was later suspected in the heinous murder of a young student. Though the father was never charged, he committed suicide. Or so it seemed.Since then Jeffrey's mother and his sister Susan have concealed themselves in the remote tangled swamps of the Upper Keys, where Susan creates word games for Miami Magazine.