With no evidence against him and no known motive, DI Costello must break the rules if she is to get her man. Detective Inspector Costello has resigned. No notice, no goodbyes. Convinced that George Haggerty murdered his wife and son despite his cast-iron alibi, Costello has gone solo, determined to expose a ruthless killer without being hampered by police protocol. But is she right about Haggerty's guilt? And where has she disappeared to? DCI Colin Anderson has no time to ponder the loss of his partner of twenty years. With a badly beaten body found on a remote mountain pass; a woman with a serious head wound who won't communicate in any way; and a substantial pool of blood discovered at the edge of Loch Lomond, Police Scotland have their hands full. Could there be any connection to Costello's disappearance ...?

A macabre discovery throws disturbing new light on a 20-year-old murder case in the latest tense and twisting Anderson and Costello mystery. In August 1992, a young mother and her two small sons were brutally murdered in the woods behind their home. Her neighbour Andrew Gyle was convicted of the crime and sentenced to life imprisonment. Now, twenty-three years later, a macabre discovery throws new light on the case. Could there have been a shocking miscarriage of justice? Having only just returned to work following an enforced leave of absence, DCI Colin Anderson knows he must make a success of his comeback case. But, as he and his partner, DI Costello, uncover serious discrepancies in the original investigation, it becomes clear that not everyone is telling them the truth. Meanwhile, Costello worries that Anderson is struggling to cope – and his increasingly odd behaviour causes her to begin to think the unthinkable: can she trust her own...

Past crimes cause new murder in this tense and twisting psychological thrillerA few days before the summer solstice a 92-year-old woman is found burned to death in her home. On the same day, a man's mutilated corpse is discovered in a field, his arms ripped from their sockets, a Tarot card depicting The Fool inserted in his mouth.When the victim is identified as someone for whom the police have been looking for almost a year, detectives Anderson and Costello find themselves caught up in a case where nothing is as it seems. Was the dead man really responsible for three child murders? And what is the connection with the death of the elderly woman?The investigation leads to the tranquil shores of Loch Lomond where Anderson and Costello will finally uncover the shocking truth.

It's Christmas, and half the Partickhill police squad is down with flu. Not good timing, with a series of cyanide poisonings in the area, plus two small boys reported missing in the space of a few days. And then there's the monumental task of providing concert security for rock legend Rogan O'Neill . . .But for Detective Inspector Colin Anderson, the nightmare is about to get terrifyingly close to home. For a third boy has now gone missing – Colin's own son, Peter.The team race to find the boys before it is too late. But how long will it be before they realize the key is hidden in the lyrics of a rock song – 'Tambourine Girl' by Rogan O'Neill?