To the public, he’s a hero: a killer who targets convicted paedophiles. Two men are dead already - tortured to death. Even the police don’t regard the cases as a priority. Most feel that two dead paedophiles is a step in the right direction. But to DC Maeve Kerrigan, no one should be allowed to take the law into their own hands. Young and inexperienced, Kerrigan wants to believe that murder is murder no matter what the sins of the victim. Only, as the killer’s violence begins to escalate, she is forced to confront exactly how far she’s prepared to go to ensure justice is served….

The teenage girl was the first victim. Her throat cut to the bone, she didn’t stand a chance. Her mother, at least, had time to fight back. Briefly. Called to the crime scene in leafy Wimbledon, Maeve Kerrigan’s first thought is that this is a domestic dispute gone badly. But the husband is found lying bleeding and unconscious in an upstairs room. As a criminal barrister he insists he’s the third victim rather than their prime suspect, even if he’s a man who makes enemies easily. The only other surviving family member is 15-year-old Lydia....

He meets women. He gains their trust. He kills them. That’s all Maeve Kerrigan knows about the man she is hunting. Three women have been strangled in their homes by the same sadistic killer. With no sign of a break-in, every indication shows that they let him in. But the evidence is pointing at a shocking suspect: DI Josh Derwent, Maeve’s colleague. Maeve refuses to believe he could be involved, but how well does she really know him?

COP KILLER STRIKES AGAIN! The tabloid headlines are lurid but accurate. A killer is terrorising London but this time it is the police who are the targets. And Maeve Kerrigan and her boss Josh Derwent are clueless as to why. But it will only be a matter of time before the murderer selects his next victim…

Arson, accident or murder? After a fire rips through a North London tower block, two bodies are found locked in an 11th floor flat. But is the third victim that ensures the presence of detective Maeve Kerrigan and the murder squad. It appears that controversial MP Geoff Armstrong, trapped by the fire, chose to jump to his death rather than wait for rescue. But what was such a right-wing politician doing in the deprived, culturally diverse Maudling Estate?

Everyone's heard the rumours about elite gentlemen's clubs, where the champagne flows freely, the parties are the height of decadence...and the secrets are darker than you could possibly imagine. DS Maeve Kerrigan finds herself in an unfamiliar world of wealth, luxury and ruthless behaviour when she investigates the murder of a young journalist, Paige Hargreaves. Paige was working on a story about the Chiron Club, a private society for the richest and most privileged men in London. Then she disappeared. 

Leo Stone is a ruthless killer or the victim of a miscarriage of justice. A year ago, he was convicted of the murder of two women and sentenced to life in prison. But now he's free, and according to him, he's innocent. DS Maeve Kerrigan and DI Josh Derwent are determined to put Stone back behind bars where he belongs, but the more Maeve finds out, the less convinced she is of his guilt. Then another woman disappears in similar circumstances. Is there a copycat killer, or have they been wrong about Stone from the start?

Teenager Alison Doig disappeared from Kinloch more than 30 years ago under mysterious circumstances. Her reclusive family still lives in a remote part of the Kintyre peninsula, amidst rumours of wrecking, smuggling and barbaric cruelty. Now rich American hotelier Alice Wenger has arrived in town, determined to punish those who made her suffer in the past. But someone has vowed to keep hidden sins concealed forever. Daley’s team must race against time to expose long-held secrets and shameful lies before there are any more victims.

When DI Rowan Jackman and DS Evans are told that the IT boss has disappeared, they soon suspect foul play. Orla Cracken, known as Orac, is no ordinary techie; she was once a field agent traveling abroad undercover, working for the government. Meanwhile DC Robbie Melton discovers that two people, both urban explorers, have mysteriously disappeared whilst out exploring abandoned buildings. One went missing at a disused airfield, but was it a military base, or was it civilian?

Convicted serial killer Benjamin Fisher has finally offered to lead San Bernardino detective Daniel Ellis to the isolated graves of his victims. One catch: he'll only do it if FBI profiler Reni Fisher, his estranged daughter, accompanies them. As hard as it is to exhume her traumatic childhood, Reni can’t say no. She still feels complicit in her father’s crimes.

When a nurse is murdered on her way home from nightshift, Jack and his team go on the hunt for her killer. As more victims are uncovered, Jack finds himself tracking a murderer afflicted by a unique psychosis - one that leaves him free to maim and kill without a shred of remorse. Facing a new type of killer in an unfamiliar city, DCI Jack Logan is about to be pushed to his limits, before being forced to realize just how little he truly knows.

When Detective Kim Stone is called to the home of Samantha Brown, she finds the young woman lying in bed with her throat cut and a knife in her hand. With no sign of forced entry or struggle, Kim rules her death a tragic suicide. But a visit to Samantha’s parents rings alarm bells for Kim - there’s something they’re not telling her. And, when she spots a clue in a photograph, Kim realizes she’s made a huge mistake. Samantha didn’t take her own life, she was murdered. 

DI Kelly Porter is about to discover just how dark things can get in the Lake District. When a young woman is found unclothed, unspeaking at an ancient stone circle it's not clear if any crime has been committed. DI Kelly Porter and her team start looking into the circumstances, but the mystery girl disappears. Soon after, a brutal murder is committed and sinister markings at the scene indicate that the killer had a message.

A brutal murder in the Lake District. A double assassination in a secret lab in London’s West End. Seemingly unconnected, unexpected links between the gruesome crimes emerge, and it’s up to DI Kelly Porter to follow the trail - all the way to the capital. Back among old colleagues and forced to work alongside her calculating ex, DCI Matt Carter, Kelly must untangle a web of deceit that stretches into the highest echelons of power - a place where secrets and lies are currency and no obstacle is insurmountable.

The body of an elderly woman has been found in the bowels of a derelict asylum on the banks of the Thames. As Detective Lew Kirby and his partner begin their investigation, another body is discovered in the river nearby. How are the two murders connected? Before long, the secrets of Blackwater Asylum begin to reveal themselves. There are rumours about underground bunkers and secret rooms, unspeakable psychological experimentation, and a dark force that haunts the ruins, trying to pull back in all those who attempt to escape.