Rick Fuller, a once decorated SAS hero, now Manchester hit man, likes nothing better than disposing of his employer's rivals in return for a suitcase of cash. His spectacular fall from grace and obsession to discover the identity of the IRA terrorist who gunned down his wife all but destroyed him. Ten years have passed since that fateful day, and Ireland has seen many changes.

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.

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. 

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.

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. 

1969. Eloise Shepherd, one of MI6’s brightest rising stars, is working undercover in Soviet Russia as Magdalina Novikova. Her mission is to persuade nuclear physicist Stanislav Kalashnik to defect and bring his knowledge of Russian weapons back to the UK. On the verge of success, the operation fails suddenly and spectacularly. Seventeen years later, Kalashnik is chief engineer at the power plant near Pripyat known as Chernobyl. His concerns for the safety of the plant are growing. 

Kaltrina Dervishi is a prostitute on the run from Serbian gang leader Fisnik Abazi. The police want her to give evidence against him; Abazi wants her dead. Only her lawyer, Keira Lynch, can keep that from happening. What they don't realise, though, is that Keira isn't your typical Glasgow lawyer. When she was eight years old, she killed a man, and as they're about to find out, she's at her most dangerous when threatened.

Sam Wylde has fought off Albanian gangsters and vindictive old friends to make it to Bali, hot on the heels of her ex-husband, Matt, and Jess, their daughter, whom he took without Sam’s permission. But a nasty surprise awaits her in paradise: Bojan. A Serbian thug she thought was dead, back to make her life a misery.

Alex Reeve was Operative 66. A former special-ops soldier and one of the UK's deadliest weapons, he was a member of the secretive SC9 - an elite security service with a remit to neutralise the country's most dangerous enemies. Falsely accused of treason, Reeve was forced to hide in the shadows as the brutal assassins he once trained alongside sought to eliminate the 'rogue asset' at any cost. But tricked into revealing himself, Reeve is suddenly dragged into a lethal conspiracy involving the British state, shadowy Russian agents...and his own father.  

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. 

British M16 Agent and former SAS trooper Jack Tate is trying to escape his past when he witnesses a terrorist attack of unthinkable scale. An electro-magnetic pulse knocks out the US power grid, killing anything with a computer processor, throwing the whole country into chaos. Under the cover of the blackout, a clandestine operation aims to assassinate prominent public figures on US soil. Looting and violence spreads across the country. And Jack Tate’s past comes back to haunt him. 

When foreign governments act like gangsters, a new kind of SAS is needed.... In London, assassins carry out a deadly chemical weapons attack at the royal wedding. All the signs point to a Kremlin-sanctioned hit. Their victim: a notorious mobster. 'The Cell' is a shadowy unit within the SAS, dedicated to fighting global organised crime. In a world where the Russian government is the real mob, it's the job of the Cell to defend British interests at home and abroad. Only the elite are selected; only the very best will survive.

SAS trooper Matt 'Lastman' Standing is a lethal killing machine with experience in Afghanistan, Iraq and Syria. Plus he's worked with French in the past. It's not a mission he wants, but Standing made a bad choice in his past, and it has come back to haunt him. Now he's hunting French in the lawless Wild West forests of Humboldt County, where the US produces most of its legal - and illegal - cannabis. But French isn't the only predator in the wilderness - there are Mexican cartels, Russian Mafia and Hungarian gangsters - and Standing has to overcome them all to get to his target.

Waking up beside the gorgeous Savannah Jones, John is shocked to learn she was for hire, and he can't pay the price - 1000 pounds or broken legs. In desperation, he turns to best friend, Mark, for the money. Only one problem - Mark has a dagger in his back.

When an MI6 agent is found to be keeping records of his missions to protect himself from betrayal he unwittingly makes himself a priority target. But how do you silence the most dangerous man imaginable? Send him into hell on earth. While Alex King is sent into Northern Iraq to tidy the loose ends of a botched mission, the archipelago of Indonesia is under communist threat from within its own military. A consortium of worried businessmen call for desperate measures and seek the services of an assassin.