DS Ewan Striker is the best detective on the force. Unconventional and uncompromising, he is respected and feared in equal amounts. Tag Westland is a rookie. A rich boy who has realised that being a cop is not as glamorous as he first thought. In fact, he has his resignation in his pocket. These two unlikely crime fighters are thrown together, as it becomes apparent that each of their investigations are inextricably linked to something even more evil: a major terrorist attack.

In the winter of 1996, on the orders of the British government, the SAS stole the contents of a safe belonging to the Provisional IRA. Rick Fuller headed that team. Days later Fuller's wife was brutally murdered. Convinced he was betrayed from within, Fuller begins a relentless search for her murderers. Ten years on, Fuller is a Manchester gangland enforcer, a lone and bitter figure.

Rookie Cop Dave Stewart knew that William Bailey was guilty of murder. All he had to do to convict him was change one line in his statement. Detective Chief Superintendent John McCauley loves dirt. He collects it in secret files to use against his enemies, and since Stewart slept with the beautiful Detective Sergeant Anne Wallace, he is the enemy. Stewart hatches a plan to destroy the evidence against him, but inside McCauley's files is evidence of a vile paedophile ring operating under the Chief's nose. Now three people are dead, and Dave Stewart is the prime suspect.

Tom Rollins has gone AWOL from his CIA black-ops unit and is living off-grid when he hears that the woman he loves, Alejandra, has been murdered by a person or persons unknown. Rollins is determined to punish her killers and sets out on his own personal search and destroy mission. Applying pressure as only he knows how, he quickly discovers who was behind the killing—a vicious gang of hardened criminals. Using his dizzying array of lethal skills, Rollins begins to take out the leaders of the gang, one by one.

Frankie Verdi, Eddie Williams and Tony Thompson are The Three Dogs. A ruthless criminal gang. A law unto themselves. Detective Jim Hacker has watched the Dogs grow from thuggish youths to psychotic criminals and seems to be the only cop in town with the determination to see justice done. Meanwhile Jamie Strange, a young Royal Marine, finds himself embroiled in the lives of the gang when his girlfriend, Laurie Holland, cuts off their engagement...to be with the most dangerous of the Dogs: Frankie Verdi. 

Dante Jacoby is a slave to the trappings of the modern world. Twenty-six years old and hopelessly addicted to booze, cigarettes, and procrastination, he’s squandered every ounce of his potential. His corporate raider father, Dorian, reaches the end of his tether and cuts Dante off as heir to the Jacoby family fortune. His mother, Fiona, is smarter than her husband: she hasn’t spoken to Dante in months. But Dante’s no victim. He knows he brought this on himself.

A master assassin craves one thing above all else: a normal everyday life. Trained to be a killer from the age of 11, Peter has never known the things the average person takes for granted. He has always been an asset. Burned by the CIA and now occupying their secret hit list, he works overseas as a Ronin, living a solitary life in hiding. But someone knows where he is. A strange man arrives at his door offering Peter the chance of a real life. "Get this done and you can be free," he is told.

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.

Jason King and Will Slater, the two most lethal operatives in government history, are out on their own. They’ve been through their personal journeys into hell, but they unite in New York City as brothers in arms. So begins a vigilante crusade against the city’s morally bankrupt inhabitants. But their private war doesn’t last long. Sometimes you can’t escape the past, no matter how hard you try. They’re revisited by old government contacts with an agenda, and soon enough they’re fighting tooth and nail to prevent the destabilization of the entire country.

Someone is killing old spies. Retired and forgotten, these relics from the Cold War are being removed—quietly and brutally. And when “Section D” MI5 agent Tom Marlowe, on medical leave after a botched mission, learns his old mentor is one of the murdered ex-agents, he starts an investigation that threatens to cost him his career, his freedom…and even his life.