When the chief suspect in the notorious "peekaboo cop killer" case blew himself up, almost taking lead investigator DCI  Duncan Bone with him, the psychologically damaged detective thought his days on the force were over. But, when another PC is abducted and murdered in the same deranged peekaboo fashion, Bone is persuaded to return to lead the new investigation.

D.I. Duncan McAdam is dispatched home to the Misty Isle. A body has been found buried in a remote location on the Waternish peninsula. Well-preserved in the peat, Isla Matheson—missing for the better part of two decades—is revealed to a shocked island community. A teenage runaway is dead...and no one is talking.

Eleven months after discovering a brutal double murder in a sleepy Northumbrian town, Detective Chief Inspector Kate Daniels is still haunted by her failure to solve the case. Then the brutal killing of a man on Newcastle’s Quayside gives Daniels another chance to get it right, and her first case as Senior Investigating Officer. When Daniels recognises the corpse but fails to disclose the fact, her personal life swerves dangerously into her professional life. But much worse, she is now being watched. As Daniels steps closer to finding a killer, a killer is only a breath away from claiming his next victim....

Five years ago, DCI John Lomond led the search for notorious Glasgow child-killer ‘The Sandman', until personal tragedy forced him off the case. In Lomond's absence, the killer was never found. Now, with nothing but work left in his life, Lomond remains obsessed with the case–despite the nightmares it brings. When a child is abducted in similar Sandman fashion from an affluent Glasgow suburb, Lomond is brought in to find them before it's too late.

It was summer in the mountains when five small children vanished from their nursery school picnic. The heat was stifling that day, the tinkle of an ice-cream van in the air.... Three-and-a-half years later, in the dead of winter, the children are returned to their families...one by one. All except for Ivy - the granddaughter of Homicide Detective Kate Wakeland. The other four children say Ivy is dead.