Zane Grey's Stories of the West #28

Young Buck Duane has his father's talent with a gun, kills a man who draws on him, and flees to ride the outlaw trail as a loner, with his hands clean of evil. Time passes, and by offer of a pardon Capt. McNelly of the Rangers recruits Buck to go undercover and discover the true identity of the mysterious crime lord, Chesaldine, and bust up Chesaldine's rustler gang in the Big Bend region. Buck falls for the Chesaldine's innocent daughter, and must resolve all conflicts or die trying.