Eric Steele is the best of the best - an Alpha - an elite clandestine operative assigned to a US intelligence unit known simply as the "Program". A superbly trained Special Forces soldier who served several tours fighting radical Islamic militants in Afghanistan, Steele now operates under the radar, using a deadly combination of espionage and brute strength to root out his enemies and neutralize them.

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.

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.

Former disgraced Delta Force commander Kolt "Racer" Raynor has earned his way back into The Unit after redeeming himself during an explosive operation at a black site in Pakistan. But he is about to face his deadliest challenge yet. The most wanted man in the world, American al Qaeda commander Daoud al Amriki, and his handpicked team of terrorist operatives, have acquired stores of Russian-built, shoulder-fired surface-to-air missiles (SAM's) from ex-Libyan spies in Cairo.

Pulled off an undercover assignment, Widow returns home to a small town in Mississippi - a place he tried to forget. Taken to be a worthless drifter by the locals, Widow uses his skills to uncover the truth about his mother's last investigation. What was she looking for? What he discovers is an unsolved mystery of missing girls and townspeople harboring a deadly secret - a secret they'll die to protect.

Former Navy SEAL Jedidiah Johnson returns to Nashville ready to begin his training with the elite warriors known as the Shepherds. He thinks he knows what to expect when he arrives at the sprawling, state-of-the-art facility, but quickly realizes he’ll have to find his place as the rookie leader of a new team. Then he starts having visions of an imminent attack overseas, and with the clock ticking, Jed and his team are dispatched to neutralize the threat. All the while, Jed hears whispers of another threat - a name that raises unexplained fear and anger throughout the organization.

The President of the United States can’t decide how to respond to a classified video showing the Taliban’s brutal treatment of their captive - a female helicopter pilot of the Army’s elite Special Operations Aviation Regiment. Afraid that a botched rescue will further destabilize foreign policy and end his presidency, the Commander-in-Chief falters. But when the Special Ops community learns that one of their own is being tortured and will almost certainly be killed, no executive order will stop them from attempting a rescue mission.

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.

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.

A desperate Kremlin takes advantage of a military crisis in Asia to simultaneously strike into Western Europe and invade east Africa in a bid to occupy three rare Earth mineral mines that will give Russia unprecedented control over the world's hi-tech sector for generations to come. Pitted against the Russians are a Marine lieutenant colonel pulled out of a cushy Pentagon job, a French Special Forces captain and his intelligence operative father, a young Polish partisan fighter, an A-10 Warthog pilot, and the commander of an American tank platoon....