London, England: Slough House is where the washed-up MI5 spies go to while away what's left of their failed careers. The "slow horses," as they’re called, have all disgraced themselves in some way to get relegated here. Maybe they messed up an op badly and can't be trusted anymore. Maybe they got in the way of an ambitious colleague and had the rug yanked out from under them. Maybe they just got too dependent on the bottle—not unusual in this line of work. One thing they all have in common, though, is they all want to be back in the action. And most of them would do anything to get there─even if it means having to collaborate with one another.River Cartwright, one such “slow horse,” is bitter about his failure and about his tedious assignment transcribing cell phone conversations. When a young man is abducted and his kidnappers threaten to broadcast his beheading live on the Internet, River sees an opportunity to redeem himself. But is the victim who he first appears to be? And what’s the kidnappers’ connection with a disgraced journalist? As the clock ticks on the execution, River finds that everyone has his own agenda.

    While out on a run in the middle of the night, a young girl runs into him on the seaside boardwalk. Barefoot and terrified, she’s running from a group of heavily armed men with one clear goal—to kill the fleeing child. After Dryden helps her evade her pursuers, he learns that the eleven year old, for as long as she can remember, has been kept in a secret prison by forces within the government. But she doesn’t know much beyond her own name, Rachel. She only remembers the past two months of her life—and that she has a skill that makes her very dangerous to these men and the hidden men in charge.Dryden, who lost his wife and young daughter in an accident five years ago, agrees to help her try to unravel her own past and make sense of it, to protect her from the people who are moving heaven and earth to find them both. Although Dryden is only one man, he’s a man with the extraordinary skills and experience—as a Ranger, a Delta, and five years doing off-the-book black ops with an elite team. But, as he slowly begins to discover, the highly trained paramilitary forces on their heels is the only part of the danger they must face. Will Rachel’s own unremembered past be the most deadly of them all?

    Each presses a button for their floor, but the elevator proceeds, non-stop, 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 Manhattan 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.Clearly, this is anything but random. This is a cold, calculated bid to terrorize the city. And it’s working. Fearing for their lives, thousands of men in women working in offices across the city refuse leave their homes. Commerce has slowed to a trickle. Emergency calls to the top floors of apartment buildings go unanswered.Who is behind this? Why are they doing it? What do these deadly acts of sabotage have to do with the fingerless body found on the High Line? Two seasoned New York detectives and a straight-shooting journalist must race against time to find the answers before the city’s newest, and tallest, residential tower has its Friday night ribbon-cutting.

    There must be a victim. A suspect. A detective. The rest is just shuffling the sequence. Expanding the permutations. Grant McAllister, a professor of mathematics, once sat down and worked them all out – calculating the different orders and possibilities of a mystery into seven perfect detective stories he quietly published. But that was thirty years ago. Now Grant lives in seclusion on a remote Mediterranean island, counting the rest of his days.Until Julia Hart, a sharp, ambitious editor knocks on his door. Julia wishes to republish his book, and together they must revisit those old stories: an author hiding from his past, and an editor, keen to understand it.But there are things in the stories that don’t add up. Inconsistencies left by Grant that a sharp-eyed editor begins to suspect are more than mistakes. They may be clues, and Julia finds herself with a mystery of her own to solve.