Harlan Coben's Lazarus

Forensic psychiatrist Dr Joel 'Laz' Lazarus is forced to confront long-buried demons after his father Dr L dies in suspicious circumstances. At first assured his dad's death is a suicide, Laz is soon sucked into a world of murderous conspiracy, and a race to find the killer, by strange visions of people he knows to be dead.

“The truth never dies.”