Amazon.com description: Product Description: Johnstone Country.  Frontier Spirit Lives Here.

There are a lot of ways a man can end up on a wanted poster. There’s the easy way (murder), there’s the hard way (robbery), and then there’s Dooley Monahan’s way (by accident.) On the trail west with his trusty horse and dog, the hapless gunslinger stops a mean, hungry bear from making lunch out of the legendary Buffalo Bill Cody. In turn, Cody grubstakes Dooley for the purchase of a silver mine in the lawless, violent boomtown of Leadville, Colorado. Dooley can’t believe his good luck. But when he guns down three deadly outlaws, the grateful townsfolk pin a sheriff’s badge on Dooley. And that’s when his luck runs out . . .

Turns out there’s a war going on between two rival gangs. Stagecoaches are being robbed every other day, and fingers are being pointed at Dooley himself. There’s a tradition here in these parts, he discovers. If a sheriff’s no good, they hang him. And if the next one’s no better, they hang him twice . . .