Elmore Leonard 
Law at Randado [EPUB ebook] 

Phil Sundeen thinks Deputy Sheriff Kirby Frye is just a green local kid with a tin badge. And when the wealthy cattle baron’s men drag two prisoners from Frye’s jail and hang them from a high tree, there’s nothing the untried young lawman can do about it. But Kirby’s got more grit than Sundeen and his hired muscles bargained for. They can beat the boy and humilate him, but they can’t make him forget the jog he has sworn to do. The cattleman has money, fear, and guns on his side, but Kirby Frye’s the law in this godforsaken corner of the Arizona Territories. And he’ll drag Sundeen and his killers straight to hell himself to prove it.