The Guns of Abilene — J.R. Roberts

The Gunsmith's old friend, Bill Hickok, controls Abilene, Kansas with a tight fist and a fast gun, brooking challenge by no man. But even the legendary Wild Bill needs a hand when the James brothers, John Wesley Hardin, Phil Coe, and Ben Thompson converge on the town at once.
Clint Adams takes Hickok's side-but not before a sexy lady saloonkeeper gets into the act, and into The Gunsmith's bed. She does her level best to make him stay on for good. But Adams is too busy dodging bullets and backing up Wild Bill to let a woman tie him down.