When a Russian defector is assassinated in a sleepy English seaside town, Group Fifteen agents John Milton and Michael Pope find themselves in a rush to uncover the culprits and bring them to justice. Their investigation leads them to Moscow and a confrontation with Directorate S, the agency responsible for seeding Russian sleeper agents around the world. When lies and double crossing mean that no-one is what they seem, the two agents - alone and without backup - struggle to achieve their goals under the most dangerous of circumstances.  

Rio de Janeiro. Brazilians call it Cidade Maravilhosa - the Marvellous City - but crime festers in its favelas like cancer. John Milton is visiting an old friend who runs a close protection business guarding the city's elite. Milton offers to stand in when one of his bodyguards doesn’t turn up for work. The job? Take the wife and daughter of an anticorruption judge to a school recital and bring them back again. Simple? Not so much. The girl is snatched off the street, and Milton is nearly killed. As he recovers at a Group Fifteen safe house, he decides on two objectives.

John Milton has started to hope that he might have a future. He has a job driving a taxi around the streets of San Francisco. He has his anonymity and his solitude. Being invisible has become a comfortable habit. He doesn't want to be found. But when a girl he drives to a party goes missing, Milton is worried. Especially when two dead bodies are discovered, and the police start treating him as their prime suspect. Milton is a fugitive from the British Secret Service, and a man in his position needs extra attention like he needs a hole in the head.

John Milton has been off the grid for six months. He surfaces in Ciudad Juárez, Mexico, and immediately finds himself drawn into a vicious battle with the narco-gangs that control the borderlands. He saves the life of an idealistic young journalist who has been targeted for execution. The only way to keep her safe is to smuggle her into Texas. Working with the only untouchable cops in the city and a bounty hunter whose motives are unclear, Milton must keep her safe until the crossing can be made.

New York isn't ready for Britain's most dangerous ex-assassin.... John Milton has finally found a place to escape the bloodshed: off-season Coney Island. No tourists. No special ops. Just peace and quiet. But when a local boy witnesses a grisly murder, Milton can't resist investigating. Milton uncovers a vicious drug kingpin and a group of crooked cops from a notorious precinct known as The Alamo. Against such dangerous foes, Milton's quest for redemption could come to an end.

John Milton's life is about to change. The former government assassin follows a lead to Manila that he hopes will transform everything. But things don't go to plan. He never expected to wake up in an unfamiliar hotel room beside a dead body. And, unfortunately for him, Milton doesn't remember a thing about the night before.... Thrown into a gruesome Filipino prison, he puts together the clues of his betrayal. With no allies and even less hope, Milton must use his wits to escape and take revenge....

A desperate Kremlin takes advantage of a military crisis in Asia to simultaneously strike into Western Europe and invade east Africa in a bid to occupy three rare Earth mineral mines that will give Russia unprecedented control over the world's hi-tech sector for generations to come. Pitted against the Russians are a Marine lieutenant colonel pulled out of a cushy Pentagon job, a French Special Forces captain and his intelligence operative father, a young Polish partisan fighter, an A-10 Warthog pilot, and the commander of an American tank platoon....

An assassin haunted by his past. Two young refugees out of their depth and in need of his special talents. John Milton is no stranger to the world's seedy underbelly. But when the former British secret service agent comes up against a ruthless human trafficking ring, he'll have to fight harder than ever to conquer the evil in his path. After Milton meets a refugee who lost a sister to people smugglers, he travels through war-torn Libya and the murkiest parts of Italy and France to get the girl back.

John Milton is a former assassin for the British government. He is a ronin, trying to atone for his past sins by offering his services to those people who have no one else to whom they can turn. Milton is keeping a low profile in London when he meets Eddie Fabian. Fabian confesses that he is considering suicide and that the reason for his depression was the abuse that he suffered as a child. Milton offers to help, but, before he can, Eddie is found dead in circumstances that Milton considers suspicious.

Bury your enemies, and bury them deep. John Milton thought he was done with Avi Bachman. The most dangerous man he's ever known has been incarcerated in Angola, the brutal Louisiana prison. Inmates rarely leave Angola. Once you go in, the only way out is in a box. But Bachman is no ordinary prisoner. He was an assassin for the Mossad, and he has favours to call in.