Mercy by Jussi Adler-Olsen is Scandinavia's new bestselling crime writing sensation At first the prisoner scratches at the walls until her fingers bleed But there is no escaping the room With no way of measuring time, her days, weeks, months go unrecorded She vows not to go mad She will not give her captors the satisfaction She will die first *** 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