A violent encounter forces Kane to emerge from a life in hiding, where he had hoped his wife and children would be safe. He must go on the run and fight for the lives of those he holds most dear. The forces out to kill him are skilled, well-armed, and his former colleagues in the Mjolnir Agency, a black-ops shadow section of MI6.

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.

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.

In a desperate attempt to prove his innocence, Kaine is forced to rely on two women he barely knows-a country veterinarian who treats his wounds and an IT expert with a dark secret of her own. Kaine must battle his overwhelming guilt, life-threatening injuries and strong moral code as he hunts for the people who turned him into a mass-murderer.

CIA operative Mark Pierce is a trained killer with a strict moral code—he only targets those who truly deserve to die. So he has no qualms about taking out Victor Vautrin, an international arms dealer supplying fanatical terrorists in West Africa who may soon trigger a brutal civil war. But when he is tasked with other objectives—rescue kidnapped tourists and recover eleven million dollars of stolen CIA money—it quickly becomes clear to Pierce that someone doesn't want him to succeed in his primary mission.