The Devil's Back #1

Death Rides the Rails!
Marshal Samuel 'The Hawk' Hawkes is on a mission to apprehend the Arizona Kid! His chase leads him to the top of a speeding train where the Arizona Kid is killed by a mysterious assassin! Now, the Marshal has set his sights on capturing this unexpected killer. Little does he know, it's the beginning of a wild ride that will lead him to the secret of The Devil's Back!