Deadwood by Peter Dexter (1986) Random House

Deadwood, Dakota territories, 1876.  Wild Bill Hickock, his friend, Charlie Utter, and Calamity Jane come together in a real wild-west story.  There are Chinese immigrants, gamblers, whore masters, miscreants, and a man who is convinced that Hickock has bested him and ruined his reputation.  He also knows he could not beat the legendary gunman in a fair fight.  But what’s fair in real life?