Beneath the surface a war rages between the surviving demons still inhabiting the Earth and those few, the initiated, who fight to keep it buried deep where it belongs in the darkest shadows. Troy Odell was doing what he did best, taking the fight to the enemies of the free world. No two missions were ever the same, but he never expected his world to turn so violently upside down as it did. The only surviving member of his team of US Marine Raiders, he finds himself drawn into that secret battle.

Their plans to survive the end of humanity were meticulous. Thorough. Flawed. They landed back on Earth hundreds of years after their expected return, and now the planet they once called home is unrecognisable. Warring tribes threaten their very survival, and members of Sierra team and Dr. David Anderson must work with their now-sentient AI to find a way to live peacefully with the survivors of the African facility.

At the end of the world, a groundbreaking scientific experiment will change everything. Dr. Laura Reynolds had it all. A job she loved. The respect of her peers. Student debt she was slowly chipping away at. And one day, it all went away. She saw the wrong thing—a colleague's mistake. And to escape, he framed her. Laura's only option is to join a secretive research project in Antarctica, where she hopes to keep practicing medicine and one day get her life back. But soon after arriving, she realizes that things aren't what they seem in this advanced facility.

With the power gone, the UK falls into a state of panic. The ensuing anarchy is simply the warm-up act. Shaun Taylor is stranded far from home, far from a broken family he needs to make whole again, and he will do whatever it takes to get back to them. What would you do to get home? What would you do if the lights went out?  

Ranger Quinn thought that morning would be like so many others. A hangover, a day off before going back to work keeping the lower levels of Zion City safe from itself. But a crime so horrific, so brutal in its execution, turns those mundane expectations around. An investigation into the death of a senior leader in their underground utopia safe from the harsh radioactive wastelands beyond their walls forces Quinn beyond that safety and into the world outside.