Michael A. Stackpole & William F. Wu 
Enemy Reborn 

In the New York Times–bestselling author’s epic fantasy sequel to A Hero Born, a new power arises as chaos overtakes Reality. As a Chaos Rider, Locke ventured into the realm where time and change rage out of control. Though he set out to find his lost father, he must now become the hero he has been seeking. The Seal of Reality has been broken, and the Wildness that was once kept at bay is unleashed upon the world. Behind this devastation is an evil more ancient and more awesome than Fialchar himself. The only hope of defeating this new Darkness is with an unlikely alliance of Empire and Chaos forces, led by an untried swordsman from beyond time. An Enemy Reborn is the final installment of the Realms of Chaos duology.