He lost his arm to outlaws. Replaced it with a double-barreled boom stick. Now Civil War veteran Dr. John Bishop is armed for justice . . . John "Shotgun" Bishop's lowlife brother, Devlin, has set his cold black heart on taking over John Chisum's land, destroying the cattle king's dream of building a new town. So Chisum hires Shotgun and his partner, White Fox, to protect his investment. But when the family feud turns into an all-out turf war, Shotgun...

"Outlaws left him with one arm, which he replaced with a specially rigged .12 gauge shotgun. Now Dr. John "Shotgun" Bishop cures evil one barrel at a time. Even in the darkest days of the Civil War, he never saw anything like the new scourge of germ warfare. Diseased corpses dumped in wells, midnight raids bombarding women and children with infected blood, spreading plague through the Cheyenne nation. The culprits are led by Shotgun's one-time protégé,...