The Unquiet by John Connolly

Haunted private detective Charlie Parker returns in this "not to be missed" (Bookreporter) thriller by New York Times and internationally bestselling author John Connolly.
Daniel Clay, a once-respected psychiatrist, has gone missing, following revelations about the harm done to children in his care. Now, a killer obsessed with finding the truth about his own daughter's disappearance is seeking revenge, and Charlie Parker finds himself trapped between those who want the truth about Clay to be revealed, and those who will go to any lengths to keep it hidden.

As with his previous novels, John Connolly masterfully intertwines mystery, emotion, and violence in this gripping page-turner. Fast-paced, hypnotic, and elegantly written, The Unquiet is John Connolly at his chilling best.