Operation Treadstone has nearly ruined Adam Hayes. The top-secret CIA Black Ops program trained him to be an all but invincible assassin, but it also cost him his family and any chance at a normal life. Which is why he was determined to get out. Working as a carpenter in rural Washington state, Adam thinks he has left Treadstone in the past, until he receives a mysterious email from a former colleague, and soon after is attacked by an unknown hit team at his job site.

Special Operations Chief Tyler Brooks might not know quantum mechanics, or have an eidetic memory, but he is the very best in the world at one thing: leading covert ops. When an unpredictable enemy causes the catastrophic loss of his entire SEAL team, Brooks is recruited by Pat Moody to lead a new elite squad, Task Force Omega. Moody’s promise—access to mind-bending tech that grants a glimpse of the future.

Navy SEAL Keith “Chunk” Redman has been one of the military’s top doorkickers since the day he pinned on his trident: loyal, single-minded, lethal. Tasked to lead a new, covert team of Tier One SEALs—the most elite special operators in the world—Chunk can no longer simply rely on the status quo. To safeguard America, he needs help to stay a step ahead of its adversaries.

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.

On the eve of his medical retirement, Navy SEAL Jedidiah Johnson receives a frantic call from his estranged childhood best friend, David Yarnell. David’s daughter has been kidnapped off the streets of Nashville in broad daylight. The police have no suspects and no leads. The only clue: the body of a dead priest left behind at the scene. With the clock ticking, David is growing desperate, as is his wife, Rachel...Jed’s first love.