It begins with a letter... The letter contains a request - think of a number, any number - and a sealed envelope. Inside the envelope is that number... When Dave Gurney, retired NYPD homicide detective, is contacted by an old college acquaintance about some startling letters he’s been receiving, it is at first little more than a diverting but sinister puzzle. Until the acquaintance is brutally killed.Suddenly Gurney finds himself in the middle of a murder investigation that makes no sense.

Nick Horrigan has finally put his traumatic past behind him...until a SWAT team smashes into his place in the middle of the night. He's told that a terrorist has seized control of a nuclear power plant and is threatening to blow it up... Unless he can talk to Nick. As Nick rockets toward the truth, peeling back layer after layer of lies and deception, only one thing is certain: the long-buried secret, tied to the traumas of his own past, threatens his life at every turn.

Detective Miles Jensen is called to the lawless town of Santa Mondega to investigate a spate of murders. This would all be quite ordinary in those rough streets, except that Jensen is the Chief Detective of Supernatural Investigations. The breakneck plot centres around a mysterious blue stone, 'The Eye of the Moon', and the men (and women) who all want to get their hands on it: a mass murderer with a drink problem, a hit man who thinks he's Elvis and a pair of monks among them.

A family is gunned down in the snow, but one of the children survives. Three years on, that child takes revenge, and the Snow Killer is born. But then, nothing - no further crimes are committed, and the case goes cold. 50 years later, has the urge to kill been reawakened? As murder follows murder, the detective team tasked with solving the crimes struggle with the lack of leads. It’s a race against time and the weather - each time it snows, another person dies.

Van Shaw was raised to be a thief, but at the age of 18 he abruptly abandoned the illicit life and joined the US Army, leaving behind Seattle and his grandfather who taught him the trade. But after 10 years of estrangement, Van's grandfather has suddenly asked him to come home. He does so only to find his grandfather shot in the head and bleeding out on the kitchen floor....

Reality TV star Buck Nance incites a riot in a bar and vanishes in the melee. His agent, Lane Coolman, has been accidentally taken hostage by two petty criminals who now think they can turn a quick profit by ransoming an LA talent agent.

The mystery of Buck’s disappearance draws in a range of characters from across the island, including a redheaded con artist named Merry who, using a razor blade and a high-speed car, has developed a signature way of luring in her victims.

DC Gary Goodhew is intelligent, intuitive, and the youngest detective at Cambridge's Parkside Station. He is the first on the scene when the body of a young woman is discovered on Midsummer Common and for the first time in his career is given the chance to work on a murder investigation. Soon there is an identity for the victim: Lorna Spence. Richard Moran, her boyfriend and employer, has reported her missing and is distraught to discover that she has been killed.

Daniel Brasher left a high-paying job as a money manager to work at a job he loves, leading counselling sessions with recently paroled ex-cons. Now he's ready to move on and start a private practice. But before he leaves, he finds an envelope in his mailbox - one intended for someone else. Inside is an unsigned note that says: "admit what you've done or you will bleed for it. you have 'til november 15 at midnite." The deadline has already passed and the person to whom the envelope was addressed was brutally murdered. Is Daniel next?

There isn't much fun in the sun when a billionaire real estate tycoon is found murdered on the Tilt-a-Whirl at a seedy seaside amusement park in the otherwise quiet summer tourist town of Sea Haven. John Ceepak, a former MP just back from Iraq, has just joined the Sea Haven police department. The job offer came from an old Army buddy who hoped to give Ceepak at least a summer's worth of rest and relaxation to help him forget the horrors of war. Instead, Ceepak will head up the murder investigation.

Criminologist Martin Knight lives a gilded life and is a thorn in the side of the police. But then his wife, Liz, goes missing. There is no good explanation and no sign of Martin.... To make things worse, Liz is the ex-girlfriend of DCI Craig Gillard who is drawn into the investigation. Is it just a missing person or something worse? And what relevance do the events around the shocking Girl F case, so taken up by Knight, have to do with the present? The truth is darker than you could ever have imagined.

Terry Flynt is a struggling legal clerk, desperately trying to get promoted. And then he is given the biggest opportunity of his career: to help defend a millionaire accused of murdering a woman in his hotel suite. The only problem is that the accused man, Vernon James, turns out to be not only someone he knows, but someone he loathes. This case could potentially make Terry's career, but how can he defend a former friend who betrayed him so badly?

Jacob Reese enjoys the quiet life, running a coffee shop and renting out his cottage in The Hollows, Vermont. But the calm is shattered when a woman who looks eerily similar to his ex-girlfriend Laura turns up to stay in the cottage, and leaves a mysterious note in the guest book. Now Jacob’s seeing Laura everywhere - a glimpse of her face across the street, her music box left outside his house, a gift he gave her years before hanging from the trees. But it can’t be Laura. Because Laura’s dead.

First, Patrick receives a DVD in the post. It shows footage of him and his wife Ariana walking, dressing, going to work - all filmed by cameras hidden in their house. Someone is clearly out to get him. And then the email arrives: GO ALONE. TELL NO ONE. DO WHAT WE SAY. OR SHE DIES. Patrick’s life is turned upside down. Suddenly this has become a matter of life and death.

Time's up. You're Next. "All he had to do was name the woman he wanted. It was that easy. They would do all the hard work. "Detective Sergeant Mark 'Heck' Heckenburg is investigating the disappearance of 38 different women. Each one was happy and successful until they vanished without a trace. Desperate to find her missing sister, Lauren Wraxford seeks out Heck's help.

Do you need my help? It was always the first question he asked. They called him when they had nowhere else to turn. Raised and trained as part of a top-secret programme, he was sent to the worst places in the world to do things his government denied any knowledge of. Then he broke with the programme and disappeared. But now someone's on his tail. Someone who knows he was once known simply as Orphan X.