Zane Grey 
The Rustlers of Pecos County [EPUB ebook] 

Texas was a huge wide place full of frontiersmen, ranchers, farmers, cowpokes, shiftless no-accounts, shootists, rascals, and politicians — all of them blended together into a single state. The Rangers — lawmen, Texas Rangers — were outnumbered a thousand to one, and in one county — Pecos county — the law was all but helpless. Until Ranger Vaughn Steel went to Pecos, looking for revenge. . . .