When True Night Falls

Blending science fiction and fantasy, the second book of the Coldfire Trilogy continues a dark tale of an alien world where nightmares are made manifest.
Two men, absolute enemies, must unite to conquer an evil greater than anything their world has ever known. One is a warrior priest ready to sacrifice anything and everything for the cause of humanity's progress; the other, a sorcerer who has survived for countless centuries by a total submission to evil. In their joint quest, both will be irrevocably changed.
When True Night Falls is the sequel to C. S. Friedman's acclaimed Black Sun Rising.