Choose Your Own Time Machine 1 Secret of the Knights by Jim Gasperini Secret of the Knights by Jim Gasperini (Bantam Books, February 1984).
Choose Your Own Time Machine 4 Sail with Pirates by Jim Gasperini Sail with Pirates by Jim Gasperini (Bantam Books, August 1984).
Choose Your Own Time Machine 8 The Mystery of Atlantis by Jim Gasperini The Mystery of Atlantis by Jim Gasperini (Bantam Books, August 1985).