In the ever-changing modern international landscape, men serving at the tip of the spear need to be able to adapt, adjust, and excel in any environment, under any rules of engagement, at any time. This can lead to men making hard decisions that toe, and sometimes cross, the line between right and wrong.

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 secret buried in the Antarctic. A puzzle unsolved for thousands of years. And a Brooklyn-born master gunnery sergeant who's royally pissed that he has to babysit the researchers sent to figure it all out. But when Patrick "Wic" Finnegan finally sees what the team has uncovered, he can't believe his eyes, nor is he prepared for the violence to come. Soon, the portal opens and unleashes a storm of unbridled fury upon humanity.

Meet Kolt Raynor. A Delta Force operator and one-time American hero, he is still trying to make sense of his life - and duty - after a secret mission gone bad. Three years ago, in the mountains of Pakistan, Raynor made a split-second decision to disobey orders - one that got some of his teammates killed and the rest captured. Now he’s been given a second chance to do right by his country, his men, and himself. But Raynor’s shot at redemption comes at a price.

In a world invaded by demons, it's up to Katie and her Killers to restore order while also evading enemies - and friends - who want her in the worst way.

Matthew Riker keeps to himself, doesn't cause trouble, and never talks about his past. But after a chance encounter with a woman and a small child on the run, Riker will have to make a choice: use his hard-won skills to protect two innocent victims, or stay in the safety of his quiet life. What follows is an adrenaline-soaked thrill ride that will take Riker on a cross-country chase, through the seedy underbelly of a New York criminal empire, and into the darkest places of the human heart.

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.

Jason Sterling had a simple life by all accounts. He had worked the same job his entire adult life, he had never married, and he had no children. He was used to doing things on his own. His comfortable life was shaken to the core the day he learned of his fathers death. It was a mysterious meeting that set life-altering events in motion, and the allure of a new life was too great to walk away from. When an electromagnetic pulse brings the modern world to its knees, Jason's choice proves to be the right one.

Josh Duffy is staring into the abyss. A decorated army veteran turned military contractor, his last mission went sideways, leaving him badly injured and his career derailed. Now, he’s working as a mall cop, trying to keep his family one step ahead of the bill collectors. So when a chance at redemption - and a big pay day - comes his way, Duff eagerly jumps in. The job - to ride shotgun on a motorcade of heavily armed and armored vehicles as they roll into Mexico’s cartel country.

When a viral apocalypse kills 97 percent of the people on the planet, the survivors' humanity is hanging by a thread. Amid the leftovers of civilization, ex-Army Ranger Jason Larsen is reminded of the meaning of hope, family, and loyalty by a dog and a young boy who are as alone as he is. The survivors he seems to collect become family, and that is very bad news for those who think they run the apocalypse.

Knocking at death’s door. Bargaining for a second chance. Seems like a heck of a way to find out about an alien invasion.... Vietnam vet Albert Jenkins is battling a bulging waistline and a passion for drink. So when a towering pile of scrap rocket parts falls and crushes the stubborn curmudgeon, he thinks it’s finally the end. But just as he’s about to take one final breath, a snarky alien parasite offers him a deal: His life in return for sharing his body.

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.

War is in the air.... The Gun Club members recoil from the explosive and violent abduction that showed just how brutally Order had been divested. The fledgling new posse is immediately tested with the knowledge that the cartel has annihilated the remaining police and National Guard in Seattle.... Elsewhere in the Northwest, the heroes become the hunters....

Contains books 1-3 of The Forgotten. Sheriff Hayden Duke was born on the Pilgrim, and he expects to die on the Pilgrim, like his father, and his father before him. That's the way things are on a generation starship centuries from home. He's never questioned it. Access points to the ship's controls are sealed, the systems that guide her automated and out of reach. Until a malfunction forces his engineer wife to the edge of the habitable zone to inspect the damage. Until she contacts him, breathless, to tell him she found a body, and it doesn't belong to anyone on board.

Over the course of a few months, along with the rest of the world, America collapses piece by piece turning the nation into a grim wasteland where the chances for survival are slim. Watch your six with counterterrorism agents as they try to keep a doctor and each other alive. Join a team of CDC doctors as they race to find a cure and the virus picks them off one by one. Scramble with a retired Air Force colonel thrust into the command of a Special Forces team trying to prop up a dying government.