Longarm and the Owlhoot's Graveyard — Tabor Evans

There's a headstone with Longarm's name on it…

Deputy U.S. Marshal Custis Long has bullet-holed of every member of Nate Hathaway's gang except for the no-good desperado himself, who's high-tailed it to a town called Lodestone.
 
The comely Caroline Thaxter is going to Lodestone too, to find her outlaw daddy. She welcomes Longarm's company -- with wide-open arms. Too bad Lodestone ain't so hospitable. All the owlhoots who go there wind up dead. And even a good man like Longarm might not make it out alive…