The Longer the Shadow, the Lower the Sun
In Texas there's a golden rule: the man who's got the gold, gets to make the rules. Rian McCool spent a year in prison figuring that one out--knowing when he was released he would take revenge on the man who had framed him. Frank Bonham wrote some great westerns during the 1960's which Berkley published in mass market paperback, and this is one of them.