Masters Of The Sun - Dawn of Enlightenment, #1

The world ended ten years ago, but life goes on.  For Jack Simmons, that means a life spent hunting and trapping with his friend and mentor, and trying not to think about what he lost all those years ago. Of course, even after the end of the world politics rolls along.  And when the trade caravan brings word to Jack's town of a new force rising in the west, a force rumored to have magical powers, Jack finds himself thrust on a journey with a man he does not trust in a quest to discover the truth behind the rumors.
 What he finds there will change him forever, and usher in a new era for mankind.  Assuming it does not kill or enslave them all first.