Doomsday Rider: A Ralph Compton Novel by Joseph A. West

Buck Fletcher, framed for a murder he did not commit, is presented with an intriguing offer that may stave his sentence and give him another shot at the freedom he rightly deserves. With a hardened bounty hunter on his tracks, Fletcher must rescue a senator’s disgraced daughter and make it out of Arizona alive, before the senator's minions--or the Apaches that have set the countryside to flames--bring him down.