Bryan Duffy is Witness X - a government agent implicated in a national scandal and banished to Spain until the agenda can be moved on. But when North Korean hit men attack a seeming innocent on the streets of London, Duffy is called back to the fold. He is tasked with finding the woman's assailants and bringing them to justice. Why has the woman been attacked? Duffy investigates and finds himself sucked into a whirlwind of action and mayhem that is particularly well suited to his special set of skills....

Mark Dawson's Group Fifteen Files. Quick, lightning-paced, action.

They call him 'Scorpion'. No-one knows his real name, and the only people who have seen his face are dead. He works for the highest bidder, and he's never missed a target.

The assassin appears in London with the name of an investigative reporter on his list. But has Scorpion met his match? The reporter has a protector - John Milton. And Milton might be the only man in the world more dangerous than him.

She does Britain's dirty work, but this time she needs help. Beatrix Rose, meet John Milton.... Beatrix Rose has a knack for making the British government's problems go away. When the assassin is sent to Venezuela to track down a missing scientist, she meets a contact who knows the lay of the land: none other than John Milton. As the state-sanctioned assassin and the special forces soldier team up in South America, they'll do more than capture a missing scientist....

Isabella Rose is on the run, hunted by the very people she had been hired to work for. Trained killer Isabella and former handler Michael Pope are forced into hiding in India and, when a mysterious informer passes them clues on the whereabouts of Pope's family, the prey see an opportunity to become the predators.

Isabella Rose, the Angel, is used to surprises, but being abducted is an unwelcome novelty. She's relying on Michael Pope, the head of the top-secret Group Fifteen, to get her back. When ISIS get involved, the situation becomes even bleaker. Isabella's abductors are in turn abducted, and she finds herself trapped in Raqqa, the capital of the self-styled caliphate. Meanwhile, Pope has problems of his own: a new danger has emerged from the shadows and is threatening both him and his family.

An Underground carriage in London is destroyed by a suicide bomber. The injured and the dead litter the platform. But as a crowd forms at street level, Michael Pope knows that this is only the beginning. Pope, head of top-secret Group 15, is tasked with finding the perpetrators of this atrocity and bringing them to justice, any way he can. He knows that the answers to many of his questions will lie at the end of the money trail, but he also knows that whoever funded and organized the attack will kill again for their freedom.

Beatrix Rose has worked her way through her Kill List. Four are dead and just two remain. But now her enemies know she has them in her sights. The hunter becomes the hunted. In a thrilling conclusion to the breakneck trilogy, Beatrix and her daughter must fight them in North Africa, New York and finally in the swamps of North Carolina. It's a lightning-paced roller-coaster of action that pits a deadly assassin against the might of the most powerful private army on the planet.

Beatrix has returned from Somalia with a fresh target in her sights. Bryan Duffy is in Iraq, surrounded by mercenaries, with no easy way to get to him and no easy way to get out. Will Duffy prove to be a challenge too far?

On Christmas Eve, DCI Mackenzie Jones is called to a shooting at a remote farmhouse. Ralph Mallender believes his father lies dead inside. When three more bodies are discovered, it's clear a festive family gathering has turned into a gruesome tragedy. At first it seems like an open and shut case: a murder suicide committed by Ralph's volatile brother Cameron. Then new evidence makes Mack suspect the man who reported the crime is in fact the perpetrator. But Mack isn't the only one with a stake in the case.

Nine months ago, Beatrix Rose had her family brutally taken from her. Now all that matters is getting her daughter back. And Beatrix is no ordinary mother - she’s a skilled assassin who will do whatever it takes to find her child. Danny Nakamura deserted his post in Vietnam and disappeared into Hong Kong’s Walled City, vowing never to go home again. Decades later, his health failing, he’s suddenly found a reason to return to LA: the discovery of a daughter he never knew he had. But getting home won’t be easy....

John Milton is used to operating in the shadows, weaving his way through dangerous places behind a fake identity. Now, to avenge the death of a close friend, he must wear his mask of deception once more. Beau Baxter was brutally murdered by a drugs cartel but that doesn’t stop Milton from blaming himself for his friend’s death. With the help of a trusted team of undercover experts and Beau’s son, Milton is determined to track down the killers. And he isn't just after the man who gave the order. He’s heading right for the top.  

John Milton has a nose for trouble. He can smell it a mile away. And when he witnesses a suspicious altercation between a young man and two thugs in a car auction parking lot, he can’t resist getting involved. Milton came to Kansas City hoping to find a way out of danger. His recent vendetta against a cartel hitman who killed his friend has made him enemies in high places. Now he needs to find the only man who can get him out of this mess. 

Ciudad Juárez, Mexico, is the most dangerous city in the world. And when a mission to break the local cartel’s grip goes wrong, Isabella Rose, the Angel, finds herself on the wrong side of prison bars. Fearing the worst, Isabella plays her only remaining card... 

Beatrix Rose has been betrayed. Her husband has been murdered and her daughter, Isabella, abducted. She flees to the Hong Kong underworld to plot her revenge. Those who wronged her will pay. Beatrix is the most dangerous woman you’ve ever met. She was an assassin for The Firm, the beyond top secret agency that did the dirty work for the British Secret Services. She is lethal. Ethically flexible. Totally ruthless. And you know what they say about payback.

Milton is charged with protecting a reclusive billionaire from the threat of assassination. But when the danger comes from a direction Milton couldn't possibly have predicted, will he and his friends be able to complete the assignment and leave in one piece?