Book excerpt: A U.S. marshal sees plenty of both, but this time Custis Long's in for more than his share. He's hunting down a sheriff with a shady past when he gets sidetracked by a few pesky item--like a Wells Fargo stage full of gold. Like a trio of gunslicks headed by a pint-sized pistolero named Mary Lou. Like a pretty schoolmarm who's taken hostage in a holdup ...