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.

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.

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.

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.

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?

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.

Random House presents the audiobook edition of Killing Floor by Lee Child, read by Jeff Harding. Killing Floor is the first book in the internationally popular Jack Reacher series. It presents Reacher for the first time, as the tough ex-military cop of no fixed abode: a righter of wrongs, the perfect action hero. Jack Reacher jumps off a bus and walks 14 miles down a country road into Margrave, Georgia. An arbitrary decision he's about to regret.

It all begins on a Monday, when four people board an elevator in a Manhattan office tower. Each presses a button for their floor, but the elevator proceeds, nonstop, to the top. Once there, it stops for a few seconds, and then plummets. Right to the bottom of the shaft. It appears to be a horrific, random tragedy. But then, on Tuesday, it happens again, in a different skyscraper. And when Wednesday brings yet another high-rise catastrophe, one of the most vertical cities in the world - and the nation’s capital of media, finance and entertainment - is plunged into chaos.

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.

Four years ago, assassin Court Gentry was betrayed by his handlers in the CIA. Now, an old comrade returns to haunt him - and to force him on a mission against his will. With his ruthless employers on one side, his former friends on the other, and a doomed mission ahead, Court Gentry would kill to get out of this one alive.

‘I know you, don’t I?’ Five words - that’s all it takes to plunge Mike Wingate and his family into mortal danger. Mike doesn’t recognise the crippled stranger who approaches him at a party... but the stranger seems to know all about him. What has Mike done? Do they have the wrong man? Overnight, the threats become attacks, and Mike, his wife, and their young daughter learn they aren’t safe anywhere - especially not their own home. He doesn’t know who they are. He doesn’t know what they want.

Tom Novak is a troubled soul with a dark and bloody past. A former refugee, Royal Marine and member of the elite Special Reconnaissance Regiment, he now finds himself struggling with the deadening routine of day-to-day policing. When he is deployed undercover to infiltrate a gang of people traffickers, things go badly wrong. Faced with an impossible choice, his cover is blown, and he finds himself on the run from the Serbian mafia and even his fellow police colleagues. 

Scott Finn worked his way out of Boston's toughest neighbourhood to become a rising star in the city's most elite law firm. When the body of Natalie Caldwell, one of his closest colleagues and former lover, is found floating in Boston harbour, it appears she is the seventh victim of the Jack-the-Ripper-style murderer terrorising Boston. But police detective Linda Flaherty isn't so sure.

The Bonners are the most powerful couple in Texas. Bode Bonner is the Republican Governor and his wife, Lindsay, is always by his side. From the outside everything looks rosy. But the Bonners are not happy. Bode is bored - he longs for more excitement in his life. Lindsay is at the end of her tether. She's had enough of Bode's womanising and of playing the dutiful wife. She is desperate to break free of her bland, wealthy lifestyle. Then Lindsay makes an impulsive decision....

John Bookman - Book to his friends - is a tenured professor at the University of Texas School of Law. He's 35, handsome, and unmarried. He teaches Constitutional Law, reduces senators to blithering fools on talk shows, and is often mentioned as a future Supreme Court nominee. But Book is also famous for something more unusual. He likes to take on lost causes and win. Consequently, when he arrives at the law school each Monday morning, hundreds of letters await him, letters from desperate Americans around the country seeking his help. Every now and then, one letter captures his attention and Book feels compelled to act.