The Wages of Sin (The Ash Tallman Series)

With outlaws wreaking havoc left and right, a cow town in Texas is on the brink of becoming a ghost town. That's when it's time to call in Chicago-based Pinkerton agent Ash Tallman and his partner Vivian Valentine. Going undercover as a handsome, charming drifter, Ash is always ready with his gun and popular with the ladies. And the lovely vivacious Viv plays the role of a fervent evangelist, offering salvation - with the promise of a sweeter reward- to any sinner who can giver her clues to the whereabouts of the man so bent on revenge the gladly kills anyone who crosses his path.
But this outlaw has never before encountered the likes of Ash Tallman....