In the year 2030, the meteor Ragnarok impacted Earth, rending the world a wasteland. Billions died, the sky went crimson, and the world entered an ice age from which it will not emerge for centuries. By 2060, what is left of the United States exists underground in the Bunkers. Where once there were 144, now only four are left – fallen for reasons of starvation, rebellion, or worse. For in the wake of Ragnarok are new and sinister threats, threats which do not yet have a name… Born into this post-apocalyptic world is sixteen-year-old Alex Keener, who has lived his entire life underground in U.S. Bunker 108. But when a stranger is let into the Bunker from the wastes, in defiance of protocol, all hell breaks loose… and Alex's life will never be same again

Ragnarok was only the beginning. Buried in Cheyenne Mountain, Colorado, is the massive Bunker One. Long conquered by the spawn of the xenovirus, it is now the mission of Alex Keener, Samuel Neth, and Makara Angel to find the fallen Bunker, or die trying. Contained within are the mysterious Black Files, which may be the key to stopping the xenovirus before it is too late. But one thousand miles of post-apocalyptic desert stand between the team and their goal, and human hostiles and killer dust storms are the least of their worries. They must make it to Bunker One before the winter snows bury it… and before anyone else can claim the Black Files as their own. For growing in the south in the wake of the expanding Blights is the mysterious Empire, who will stop at nothing to secure the Bunkers’ resources, technology, and information… and Bunker One is at the top of their list. And in the Great Blight, the monsters get bigger. Much, much bigger

After two months in Skyhome, Alex and the crew are ready to depart for the next phase of their mission — convincing Emperor Augustus of the Nova Roman Empire to join them in their attack on the Great Blight. But when they enter the Empire’s borders, they find far more than they bargained for — slavers, deadly beasts, and the cunning and powerful Emperor himself. And even the far-reaching Empire is not immune to the effects of the deadly xenovirus and its newest evolutions…

Alex and friends return to a Wasteland in turmoil. The Raiders are scattered, the Exiles hunted, and the feuding Vegas gangs plot one another’s destruction. Makara, head of the New Angels, has the difficult task of convincing disparate groups to work together before Emperor Augustus and his legions arrive. But while humanity fights amongst itself, the Great Blight prepares its final onslaught — and at the center of it all, there is a secret that could spell the end of the invasion. It is a revelation only Alex can discover — and it might cost him everything

The Vegas Exodus is at a standstill. Besieged by the Xenoswarm in the town Pyrite, they must shelter in either Bunker 108 or Bunker 84 if they are to survive the winter. But in Bunker 84 lurks a darkness that could end the Exodus. And it may also be that the denizens of Bunker 84, known as “The Community,” are not as isolated from the events of the Wasteland as it first appears. The Community’s leader, Elias, has his own plans for the future of the Wasteland — and those plans will change everything

Time is running out for humanity to defeat the encroaching forces of the Radaskim. As settlements fall and the Great Blight spreads, it falls on the New Angels to unite disparate factions before it is too late. But the dark Xenomind, Askala, has plans to end humanity before that can ever happen, and only the greatest sacrifice can stop her from achieving her aims…