The Ruthless Range — Lewis B. Patten

Jason Mellor wanted to escape the reputation that had been tightening around his neck like a noose for years. So he took a job at the Grandee Ranch, hoping to hide out under an alias and spend the rest of his days in peace. But in just a matter of days, every cowpoke in Colorado old enough to fire a six-shooter knew that Mellor was still alive -- and if he wanted to stay that way, he'd have to make sure a passel of ornery back shooters was dead.