L. E Modesitt

In Earth's distant future, Tyndel is both teacher and mentor, a staunch devotee to his conservative and rigidly structured religious culture. Then a rogue infection of nanotechnology transforms him into a "demon", something more than human, and he is forced into exile, fleeing to the more technologically advanced space-faring civilization that lies to the north, one that his own righteous people consider evil. Although shaken by his transformation,...