Mercy – Jussi Adler-Olsen

Copenhagen detective Carl Morck has been taken off homicide to run a newly created department for unsolved crimes.  His first case concerns Merete Lynggaard, who vanished five years ago. Everyone says she’s dead. Everyone says it’s a waste of time. He thinks they’re right.

The voice in the dark is distorted, harsh and without mercy. It says the prisoner’s torture will only end when she answers one simple question. It is one she has herself a million times:

WHY is this happening?