It spread fast - no time to understand it - let alone learn how to fight it. Once it reached you, it was too late. All you could do is run. Rumored safe zones and potential for a cure drifted across the populace, forcing tough decisions to be made. They say only the strong survive. Well, they forgot about the smart, the inventive, and the lucky.

It’s been three years since Lee Harden emerged from his bunker into a world gone mad. Governments have fallen. And new ones have taken their place. In the United Eastern States, Lee and his team of battle-hardened operatives walk a tightrope of survival, keeping their fledgling society safe from the creatures beyond their gates - and from the enemies within. Then, an ambush in hostile territory reveals a traitor in their midst - and leaves Lee barely clinging to life. Wounded and on the run, Lee and his team race to uncover the leak before it’s too late.

Army veteran Lee Riker is staying in an Atlanta shelter and supporting himself with the odd carpentry job when his sister, Tara, summons him home to Indiana for the reading of their mother’s will. Riker boards a Greyhound bus in Atlanta with his duffel bag, less than $200 to his name, and a secret he must protect at all costs. Riker makes it to Middletown only to learn his sister has recently witnessed a gruesome death. Insisting she saw the victim rise from a pool of his own blood to attack the Samaritan rendering aid, Tara floats the idea that the man may have been a zombie.

A girl traumatized by the murder of her tribe. A battle-worn woman who became the perfect machine for survival and the deadliest special operator on Earth. Now, with the entire world collapsing around her and safety–and Alpha Team–10,000 miles away…

From the outbreak in Afghanistan to the struggles at sea, Brad and his comrades realize the war for humanity has only just begun. And there's no guarantee any of them will survive the long journey home....