Lawless by Ed Gorman

Sam Conagher arrives in Templar, giving up the dreams of his youth, being a train robber and all that. An old prison-mate is the sheriff here, and gives Sam an opportunity to get on his feet. Whoops, and who is sitting on Sam's hotel bed, but an old girlfriend of Sam's as well as the Bible-thumping sheriff's. Sam thinks he is falling in love with his employer's daughter, who has an arrogant big brother. The plot thickens when Sam discovers a secret plot to kidnap the employer's daughter. Sam has to make some life-changing decisions. Will he make the right ones? A pretty good read.