It has been many years since Dan Raglan served in the French Foreign Legion, but the bonds forged in adversity are unbreakable, and when one of his comrades calls for help, Raglan is duty-bound to answer. An ex-legionnaire, now an intelligence officer at the Pentagon, disappears. He leaves only this message: should he ever go missing, contact Raglan. But Raglan's not the only one looking for the missing man. 

Former soldier. Ex-copper. Current man on the edge. Shunned by his old colleagues, and dividing his time between a dead-end job and the bottom of a whisky bottle, former Police Scotland detective superintendent Bob Hoon’s life is a mess. Then an old face from Hoon’s Special Forces days turns up asking for help: His teenage daughter has been missing for months, the police have drawn a blank, and he needs the kind of help that only Hoon can provide. And besides, Hoon owes him one.

It is January 1721. London is reeling from the effects of the greatest financial scandal of the age, the collapse of the South Sea Bubble. William Spandrel, a penniless mapmaker, is offered a discharge of his debts by his principal creditor, Sir Theodore Janssen, a director of the South Sea Company, on one condition: he must secretly convey an important package to a friend of Janssen's, Ysbrand de Vries, in Amsterdam.

Titus Quayle was the best MI6 ever had - an operative of exceptional and lethal ability. But they burned him, abandoned him and left him for dead. Holly Morton is the daughter of the spymaster who first recognised Quayle’s potential and the key to unlocking a global conspiracy her father died trying to bring down. To uncover the truth, Quayle must keep her safe from the threat of a powerful enemy in a globetrotting race against time. Nowhere is safe. 

When ex-cop Dennis Milne, now living under an assumed identity in the Philippines, hears that his old friend Asif Malik has been gunned down in a restaurant, he decides to go back to the violent city he once called home and hunt down the murderer.

A Russian defector is found brutally murdered in a London hotel. Only four people knew he had turned - the four most important and powerful figures in Whitehall. There's only one conclusion - a mole has infiltrated the highest levels of the nation's security. Operating in secret from within Westminster's darkest corners, former spy Solomon Vine must uncover the traitor. Because Britain's future hangs in the balance. And with it the fate of the whole world.

Marc Dane is an MI6 field agent at home behind a computer screen, one step away from the action. But when a brutal attack on his team leaves Marc as the only survivor - and with the shocking knowledge that there are traitors inside MI6 - he's forced into the front line. However, the evidence seems to point towards Marc as the perpetrator of the attack. Accused of betraying his country, he must race against time to clear his name.

Dublin 1899: Lawyer Joseph Radcliffe and his black American comrade Benjamin Pierce were 'Buffalo Soldiers' together; now Radcliffe defends the toughest cases in a troubled city. In South Africa the Boer War rages and after an argument with his father, Joseph's son, Edward, runs away to join the forces. When Edward is captured and held as a spy, Radcliffe and Pierce set off to find him and bring him home. In doing so, the old soldiers find their survival skills tested to the maximum....

Nothing good ever comes from a midnight phone call. For washed-up spy Harry Tower, it is the worst news at the worst possible time. His son, Sean, has gone missing in troubled Iran after writing an exposé about government corruption. Their relationship has never recovered since Harry's wife's suicide, for which Sean holds his father responsible. And Harry, with his career on the verge of disintegration, needs to find him and put things right.

England, 1346. For Thomas Blackstone the choice is easy - dance on the end of a rope for a murder he did not commit, or join the king's invasion. As he fights his way across northern France, Blackstone learns the brutal lessons of war. Vastly outnumbered, Edward III's army will finally confront the armoured might of the French nobility on the field of Crécy. It is a battle that will change the history of warfare.

On a deserted road in Calabria, Greek aid worker Anastasia Cristakos is driving alone to visit one of the new refugee centres funded by billionaire Denis Hisami, whom she has recently married. She slows down to greet two African migrants she recognises. Too late she realises they are not her friends. This is an ambush. She manages a desperate phone call to Hisami before her Mafia kidnappers silence her with a powerful drug. Hours later she wakes up in the pitch dark on a container ship powering eastwards across the Mediterranean.

Slough House is Jackson Lamb’s kingdom; a dumping ground for members of the intelligence service who’ve screwed up: left a secret file on a train, blown surveillance, or become drunkenly unreliable. They’re the service’s poor relations – the slow horses – and bitterest among them is River Cartwright, whose days are spent transcribing mobile phone conversations.

They killed Robert Harland today, and they're going to kill the rest of you. This is the warning private investigator Paul Samson receives right after Joni Fremantle, the woman he has been guarding for a mysterious client, gives him the slip. No time to worry about that now: his life, and those of Denis Hisami, Anastasia Christakos and even the young Syrian Naji, is on the line. Samson is sure he knows why - to expose a company supplying funds to far-right groups across Europe is to paint a target on your own back.

He had been to the limit. Then they sent him further. Gary - 'Gaz' - Baldwin is a watcher, not a killer. Operating with a special forces unit deep in Syria, he is to sit in a hide, observe a village, report back and leave. But the appalling atrocity he witnesses will change his life forever. Before long, he is living as a handyman on the Orkney islands, far from Syria, far from the army, not far enough from the memories that have all but destroyed him.

Richard, Carmel and Liesl are an unlikely trio with a complex shared past. They met while working in Rwanda during the genocide. Now the three are back together, united both by a photograph and attempts on their lives. After receiving a summons from the International Criminal Tribunal of Rwanda, someone has tried to kill both Carmel and Richard. Could this be connected to the photograph they saw in Rwanda, or to the summons?