Sidewinders — William W. Johnstone; J.A. Johnstone

In frontier literature, the name "Johnstone" means big, hard-hitting Western adventure told at a breakneck pace. Now, the bestselling authors kick off a rollicking, dramatic new series--with the first novel about a pair of not-quite-over-the-hill drifters winding their way across the American west--mostly on the right side of the law...but sometimes, if the situation calls for it, on the wrong side...
Meet Scratch Morton and Bo Creel, two amiable drifters and old pals. Veterans of cowboying, cattle drives, drunken brawls, and a couple of shoot-outs, Scratch and Bo are mostly honest and don't go looking for trouble--it's usually there when they wake up in the morning.

Now, in remote Arizona Territory, they're caught up in a battle between two stagecoach lines. The owner of one, a beautiful widow, has gotten both Scratch and Bo hot and bothered--each trying to impress her as they fend off the opposing stage line trying to destroy her. But nothing is what it seems in this fight, and two tough sidewinders are riding straight into a trap.