The Semi-Final Frontier
(The third book in the Diego series)
A novel by Lionel Fenn (Charles L Grant)
In 1880, pursued by a ruthless gang of outlaws, Diego seeks refuge in a train and soon realizes that the mysterious train is really a time machine headed for the twenty-sixth century and a journey into outer space.
Used availability for Charles L Grant's Time
September 1994 : USA Mass Market Paperback