Was the biggest case of his career the worst mistake he ever made? Ten years ago, DCI Jack Logan stopped the serial child-killer dubbed "Mister Whisper", earning himself a commendation, a drinking problem, and a broken marriage in the process...When another child disappears a hundred miles north in the Highlands, Jack is sent to lead the investigation and bring the boy home. But as similarities between the two cases grow, could it be that Jack caught the wrong man all those years ago?

DS Rakesh Siyal is an idealist. Frustrated as an Edinburgh human rights lawyer, he joins the police, determined to solve the problems he sees with the criminal justice system from the inside, rather than out. His first day as a cop sees him sent down to Galashiels in the Scottish Borders, where he’s given a simple task – return a suspect to Glasgow to face justice.

In a cave near Weston, potholers discover what they think are human remains. The bones are identified as belonging to Hugo Latchford, a boy who went missing a decade ago, and whose parents belonged to a quasi-religious cult masquerading as environmental activists. It’s not long before rumours that he was sacrificed in a midsummer ritual resurface. Returning to duty from maternity leave, DI Louise Blackwell finds herself leading the investigation, soon discovering that Hugo’s parents are still alive and the cult very much still active.

Rock climbers can’t afford to make careless mistakes. But Detective Inspector Nick Dixon’s former climbing partner, Jake Fayter, died doing just that. Or so it seems. Dixon suspects foul play, but his only leads are unreliable accounts of something odd happening in Cheddar Gorge seconds before Jake fell. The more Dixon learns about Jake’s life, the more he realises that Jake hadn’t been quite the man he remembered...and a lot of people could have wanted him dead. Once Dixon gets too close to the truth, those people will emerge from the shadows and kill to protect their secrets.

A family outing to Tattershall Castle comes to a chilling end when eleven-year-old Tommy Burton disappears without a trace in broad daylight. All that remains in his place is a small blue teddy bear. DS Karen Hart and her team are called in to investigate the unusual circumstances—but for DI Morgan the crime scene is eerily familiar.

When a girl’s body is found strangled, raped, and horrifically mutilated by a boat’s propeller, deep in the heart of the Norfolk Broads, newly arrived Detective Inspector John Tanner is asked to assist with the investigation. At first, all the evidence points to a man who had a multi-million-pound reason to kill her. But when an alibi is produced from an unexpected source, and another body appears at the base of a slipway, Tanner finds himself turning to local girl Detective Constable Jenny Evans for help.

Detective Chief Inspector Harry Grimm is forced to take leave from Bristol’s Major Investigations Team when his boss, tired of Harry chasing the ghost of his murderous father, sends him north on secondment. Used to city life and high stress, Harry fears his life will now be spent handing out speeding tickets, finding lost sheep, and directing tourists. But when a local teenager runs away, Harry finds himself pulled into an investigation much worse than anyone could have ever expected.

A body is discovered deep in a cave beneath the Yorkshire Dales. Leading the investigation into the mysterious death are experienced DCI Jim Oldroyd and his partner DS Carter, a newcomer from London. The deceased is Dave Atkins, well known throughout the village but not well liked. While there is no shortage of suspects, the details of the crime leave Oldroyd and Carter stumped. 

An inmate at Tonsgrove prison is murdered in her cell, but no one is willing to talk to the police. DI Gareth Williams is receiving pressure from above to solve the case – and quickly. Then, a local seventeen-year-old girl vanishes from her home. The close-knit community is shaken and they each have a different theory. Gareth knows that time is of the essence. With two major cases being investigated at the same time, the Beaumaris force is stretched thin. Frustrated at the lack of progress Gareth’s colleague and fiancée, DI Laura Hart, decides to take action: going undercover at the prison.

It’s the night shift worker who finds them. Huddled in a hospital store cupboard is elderly Edith Higgins. Knifed to death. Sitting behind her is Staff Nurse Lily Frampton, a scalpel clasped in her blood-soaked hand. No one can understand why this kind-hearted, dedicated nurse would brutally murder a frail patient she’s spent months caring for. That same day, mild-mannered schoolteacher Rod Black is found surrounded by the battered bodies of his pupils. Why would a well-respected teacher beat five schoolboys to death?