The Drifter — J.T. Edson

When Waco moseys into Two Forks, Utah, he orders up more than the cowhand special. What he gets for his two bits is a double dose of fast-shooting trouble. Five of the meanest toughs to ever saddle a stool at the Twin Bridge Saloon are hell-bent on pumping lead into Waco's hide. And a few well-aimed slugs teach them that the quick-drawing Texan is the wrong man to tangle with.
Obliging a passel of no-account gunslingers with a shooting lesson is only a start to the troubles waiting for Waco in Two Forks. Aiming to rid the lawless town of every pistol-packing varmint, Waco fixes to pin on a sheriff's tin star. But first he's gotta face a rattlesnake of a rival whose venom has already sent one sheriff to his grave...