Margroff, Robert E
Chronological Checklist
- The Ring (New York: Ace Books, 1968) with Piers Anthony
- The E.S.P. Worm (New York: Paperback Library, 1970) with Piers Anthony
- Dragon's Gold (New York: Tor, 1987) with Piers Anthony
- Serpent's Silver (New York: Tor, 1988) with Piers Anthony
- Chimaera's Copper (New York: Tor, 1990) with Piers Anthony
- Orc's Opal (New York: Tor, 1990) with Piers Anthony
- ESP Worm: Valorous (New York: Tor, 1992) with Piers Anthony
- The Adventures of Kelvin of Rud: Across the Frames (New York: GuildAmerica, 1992) with Piers Anthony
- Mouvar's Magic (New York: Tor, 1992) with Piers Anthony
- The Adventures of Kelvin of Rud: Final Magic (New York: GuildAmerica, 1992) with Piers Anthony
- Three Complete Novels (New York: Wings Books, 1993) with Piers Anthony