But that is the nature of revenge. It escalates. It cannot be controlled. One hurt invites another, on and on until the original injury is all but forgotten in the chaos of what follows...

John Connolly's originality and talent for storytelling have quickly made him one of today's preeminent thriller writers. Now, in The Unquiet, private detective Charlie Parker returns to untangle a horrifying story of betrayal, unclean desires, and murder -- a story of never-ending evil whose conclusion is not yet written.

Daniel Clay, a once-respected psychiatrist, has gone missing. His daughter insists that he killed himself after allegations surfaced that he had betrayed his patients to foul and evil men -- but when a killer obsessed with uncovering the truth behind his own daughter's disappearance comes seeking revenge, long-forgotten secrets begin to emerge. Hired by Dr. Clay's daughter to protect her from the predator on the loose, tortured and ingenious private detective Charlie Parker finds himself trapped between those who want the truth to be revealed and those who will go to any length to keep it hidden.