Zane Grey 
The Lone Star Ranger [EPUB ebook] 

Buck Duane is the son of a famous outlaw. Though an outlaw is not always a criminal, if the Rangers say he is an outlaw, it's just as bad – he's a hunted man. After killing a man in self-defense, Duane is forced to 'go on the dodge'. Duane turns up at an outlaw's hideout, still revolting at the idea of outlawry. Worse still, all the men he kills haunt him, for years. At the outlaw hideout, he meets a kidnapped, beautiful young woman and desires to see her free…