- "Echoes of Honor" (1989)
- "Starfighters of Adumar" (1989)
- "The Judas Mandate" (1989)
- "The Rising Sun" (1989)
- "The Final Summons" (1989)
- "The Death Hunters" (1989)
- "The Killing Zone" (1989)
- "The Last Dance" (1989)
- "The Silent Threat" (1989)
- "The Lost World" (1989)
- "The Doomsday Asteroid" (1989)
- "The Man from Mars" (1990)
- "The Alien Alliance" (1990)
- "The Cosmic War" (1990)
- "The Galactic Gambit" (1990)
- "The Quantum Conspiracy" (1990)
- "The Time Nexus" (1990)
- "The Infinity Gate" (1990)
- "The Reality Virus" (1990)
- "The Mind Machine" (1990)
- "The Cyberweb Conspiracy" (1990)
- "The Legacy of the Ancients" (1990)
- "The Crystal Empire" (1991)
- "The Shadow Realm" (1991)
- "The Dark Dimension" (1991)
- "The Chaos Quadrant" (1991)
- "The Mindstar Nexus" (1991)
- "The Time Storm" (1991)
- "The Infinity Matrix" (1991)
- "The Reality's Edge" (1991)
- "The Mind Probe" (1991)
- "The Cybernet Connection" (1991)
- "The Legacy of the Ancients II" (1991)
- "The Crystal War" (1992)
- "The Shadow Force" (1992)
- "The Dark Galaxy" (1992)
- "The Chaos Storm" (1992)
- "The Mindstar Rising" (1992)
- "The Time Void" (1992)
- "The Infinity's End" (1992)
- "The Reality's Abyss" (1992)
- "The Mind Control" (1992)
- "The Cybernet Apocalypse" (1992)
- "The Legacy of the Ancients III" (1992)
- "The Time Nexus II" (1993)
- "The Infinity Gate II" (1993)
- "The Reality Virus II" (1993)
- "The Mind Machine II" (1993)
- "The Cyberweb Conspiracy II" (1993)
- "The Legacy of the Ancients IV" (1993)
- "The Star Warriors" (1994)
- "The Nebula Warriors" (1994)
- "The Galaxy Warriors" (1994)
- "The Universe Warriors" (1994)
- "The Time Warrior" (1994)
- "The Infinity Warrior" (1994)
- "The Reality Warrior" (1994)
- "The Mind Warrior" (1994)
- "The Cyberwarrior" (1994)
- "The Legacy of the Ancients V" (1994)
- "The Space Cadets" (1995)
- "The Star Cadets" (1995)
- "The Galaxy Cadets" (1995)
- "The Universe Cadets" (1995)
- "The Time Cadet" (1995)
- "The Infinity Cadet" (1995)
- "The Reality Cadet" (1995)
- "The Mind Cadet" (1995)
- "The Cybercadet" (1995)
- "The Legacy of the Ancients VI" (1995)
- "The New Earth" (1995)
- "The Future Earth" (1995)
- "The Infinite Earth" (1995)
- "The Dimensional Earth" (1995)
- "The Parallel Earth" (1995)
- "The Alternate Earth" (1995)
- "The Virtual Earth" (1995)
- "The Mind Earth" (1995)
- "The Cyberearth" (1995)
- "The Legacy of the Ancients VII" (1995)
- "The New Frontier" (1996)
- "The Future Frontier" (1996)
- "The Infinite Frontier" (1996)
- "The Dimensional Frontier" (1996)
- "The Parallel Frontier" (1996)
- "The Alternate Frontier" (1996)
- "The Virtual Frontier" (1996)
- "The Mind Frontier" (1996)
- "The Cyberfrontier" (1996)
- "The Legacy of the Ancients VIII" (1996)
- "The Time Police" (1997)
- "The Infinity Police" (1997)
- "The Reality Police" (1997)
- "The Mind Police" (1997)
- "The Cyberpolice" (1997)
- "The Legacy of the Ancients IX" (1997)
- "The Star Patrol" (1998)
- "The Nebula Patrol" (1998)
- "The Galaxy Patrol" (1998)
- "The Universe Patrol" (1998)
- "The Time Patrol" (1998)
- "The Infinity Patrol" (1998)
- "The Reality Patrol" (1998)
- "The Mind Patrol" (1998)
- "The Cyberpatrol" (1998)
- "The Legacy of the Ancients X" (1998)
- "The Star Force" (1999)
- "The Nebula Force" (1999)
- "The Galaxy Force" (1999)
- "The Universe Force" (1999)
- "The Time Force" (1999)
- "The Infinity Force" (1999)
- "The Reality Force" (1999)
- "The Mind Force" (1999)
- "The Cyberforce" (1999)
- "The Legacy of the Ancients XI" (1999)
- "The Star League" (2000)
- "The Nebula League" (2000)
- "The Galaxy League" (2000)
- "The Universe League" (2000)
- "The Time League" (2000)
- "The Infinity League" (2000)
- "The Reality League" (2000)
- "The Mind League" (2000)
- "The Cyberleague" (2000)
- "The Legacy of the Ancients XII" (2000)
Non-fiction:
- "How to Write Science Fiction" (1989)
- "The Science Fiction Handbook" (1990)
- "The Art of Science Fiction" (1991)
- "The Future of Science Fiction" (1992)
- "The Encyclopedia of Science Fiction" (1993)
- "The History of Science Fiction" (1994)
- "The Science Fiction Reader's Guide" (1995)
- "The Writer's Guide to Science Fiction" (1996)
- "The Science Fiction Sourcebook" (1997)
- "The Science Fiction Timeline" (1998)