From this Western's cover: After years alone on the open plains hunting shaggies and fighting off the likes of savage Indians and man-hungry wolves, O'Brien reckoned he was numb to killing. But when he got word that Luther and Coot Gabriel had gunned down his best friend and raped his young daughter on their Arizona spread, he aimed to make them eat their fair share of hot lead or die trying.
Teaming with Certainty Sumner, a leather-though ex-lawman-turned-bounty-hunter fixin' to collect on the outlaws' hides, O'Brien cut a bloody trail of vengeance clear across New Mexico to where the Gabriel gang was hole up. Outnumbered by a horde of fresh hired gunslingers, O'Brien and his sure-shootin' compardre started out slow, pickin' off the jaspers one by one with long-range sniping. Then, when the time was right, they let go a curdling war cry, and the two rough riders headed straight into the jaws of hell to wipe out the viper's nest in a punishing hail of double-barrelled death!