Rogue's Range by Clayton Nash
After two years in prison, all Vern Colby wanted was a little peace. First, though, he had to face the man who had put him behind bars. He did so in a seedy livery in El Paso, and then rode back to the quiet and lush Crescent Valley seeking the woman he loved. But she was no longer his, and the man who had claimed her made sure Colby savvied this: he had him beaten up and kicked out. Big mistake! When Colby strapped on his gun and unsheathed his rifle, you couldn't see Crescent Valley for the gunsmoke.