A sinister group - code-named Zodiac - has launched devastating global attacks. Twelve targets across the world, 12 code-named missions. Operating distinct sleeper cells, they are the ultimate terrorist organisation, watching and waiting for a precise attack to activate the next group. It is a frightening and deadly efficient way to stay one step ahead. And cause the most chaos. For ex-CIA operative Jed Walker, chaos is his profession. On the outer, burned by his former agency, he is determined to clear his name.

Nick Mason has already spent five years inside a maximum security prison when an offer comes that will grant his release 20 years early. He accepts - but the deal comes with a terrible price. Now, back on the streets, Nick Mason has a new house, a new car, money to burn, and a beautiful roommate. He's returned to society, but he's still a prisoner. Whenever his cell phone rings, day or night, Nick must answer it and follow whatever order he is given.

Vince Carver left the CIA with a dead friend and a close call. So much for so-called intelligence work. No longer knowing what he was fighting for, Carver switched to the private sector and swore he'd never go back. Armed with the elite skills of a special operator, he now leads a team of security specialists far from the battlefield. But everything changes when his convoy is ambushed on American soil. The three-letter agencies all want a piece of him, and the CIA is front and center.

Caspian Anderson is a translator for the United Nations—or so he’s led everyone to believe. No one suspects that mild-mannered Caspian, with his baggy clothes and sensible car, is actually an elite assassin for the US government. And that’s just how he wants it. For ten years, Caspian has worked under the code name Elias for Onyx, a black program deep within the Department of Homeland Security. His latest mission takes him to Switzerland to kill a target tied to a human trafficking ring. There, Caspian stumbles onto a web of conspiracies involving high-level political figures.

Court Gentry is known as The Gray Man—a legend in the covert realm, moving silently from job to job, accomplishing the impossible, and then fading away. And he always hits his target. But there are forces more lethal than Gentry in the world. And in their eyes, Gentry has just outlived his usefulness. Now, he is going to prove that for him, there's no gray area between killing for a living-and killing to stay alive.

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.

Nir Tavor is an Israeli secret service operative turned talented Mossad agent. Nicole le Roux is a model with a hidden skill. A terrorist attack brings them together, and then work forces them apart - until they’re unexpectedly called back into each other’s lives. But there’s no time for romance. As violent radicals threaten chaos across the Middle East, the two must work together to stop these extremists, pooling Nicole’s knack for technology and Nir’s adeptness with on-the-ground missions.

Tommy Miller is a man with deadly skills, hiding in Florida under a false identity. After being set up on an overseas mission, he’s on the run from terrorists—and from the government who betrayed him. So when his wife and daughter are violently abducted, it seems his ghosts are finally catching up with him. But Tommy isn’t the only one with secrets. His wife, Teresa, has been concealing her own dangerous past, and as Tommy races to rescue his family, he must peel away the clues she’s left behind.

When Lance Spector quit the CIA, he swore he was out for good. One more government lie and he would go off the deep end. They could find someone else to do their dirty work. As far as he was concerned, Washington, Langley, the Pentagon could all go to hell.

Defense Intelligence Agency operative Matt Drake broke a promise. A promise that cost three people their lives and crippled his best friend. Three months later, he's paralyzed by survivor's guilt and haunted by the memories of the fallen. Matt may have left Syria, but Syria hasn't left him. In the midst of his self-imposed exile, Matt is dragged back into the world of espionage and assets that he tried to forget. A Pakistani scientist working for an ISIS splinter cell has created a terrifying weapon of mass destruction.