Riders of the Purple Sage — Zane Grey

Lassiter was a gunman with a reputation as black as his clothes--and a mighty vengeance to fulfill Jane Withersteen was a homesteader on the Utah frontier--the richest woman in the Mormon village of Cottonwoods.

But that fortune was in danger. The Mormons wanted her to marry Elder Tull--and they had more in mind than the good of her soul. They wanted control of Amber Spring, the precious water that gave verdure to the wild purple wasteland.

When their methods of persuasion turned dirty, Jane found it hard to defend herself against the entire town. But that was before Lassiter rode in, strapped on his famous guns and stood up to the angry mob.