Ghost Posse by G. Wayne Tilman
In the period from 1865 to 1882, several of the most wanted men in America died. Or, did they?
There is some historical and forensic evidence suggesting they faked their deaths, the youngest dying in 1950. Drawn together by a secret organization, they return to rescue the kidnapped daughter of one of their own.
In 1883, a posse consisting of John Wilkes Booth, Capt. William Quantrill, Jesse and Frank James and Billy the Kid would be deadly. A ghost posse who rode for one last mission and returned to anonymity when they finished.