The Violent Land — Charles R. Pike

If Jubal Cade hadn’t wanted so badly to track down the man who murdered his wife, he probably would never have ventured into the mountains in such weather. Probably would never have found a couple of lovers crucified on a tree, or been taken by the crazed Ezekiel to the weird lost valley which the iron rule of a fierce religion dictated that he should never leave alive … But he did want to find the murderous Kincaid, and he had found the valley. Now, if he wanted to live, he would probably have to kill.