When one of seven ancient hellgates is accidentally opened, a surge of demonic radiation spills into our world—warping human DNA, birthing monsters, and igniting a global crisis. Amid the chaos, twelve are transformed. Only one holds the power — and the will — to fight back.

Tommy Rider didn't ask to become a weapon. But with the fate of humanity on the line, he must embrace the monstrous strength within and become the world's last hope: the Demon Hero.

From his first clash with the towering menace Triaxis to a gauntlet of ever-deadlier threats, Rider's journey spans battles, betrayals, and the crumbling of his own body and mind. Every transformation drains him. Every victory brings him closer to the brink.

Now, with the future of Earth teetering on the edge, only one question remains: Can a man touched by Hell save us all . . . or will the gate to damnation stay open forever?

Collects all four books in the explosive Demon Hero saga plus a bonus adventure.

(Contains previously released material.)