(Also known as The Tale of the Five or the "Door Into..." series)

• The Wounded Sky
• My Enemy, My Ally
• Doctor's Orders
• The Romulan Way
• Spock's World
  • (as part of a compendium volume: Sand and Stars)
• Swordhunt
• Honor Blade
• Intellivore
• Rihannsu: The Bloodwing Voyages
• Rihannsu: The Empty Chair

In the StarDrive universe:

• Harbinger: Starrise at Corrivale
• Harbinger: Storm at Eldala
• Harbinger: Nightfall at Algemron

• Spider-Man: The Venom Factor
• Spider-Man: The Octopus Agenda
• Spider-Man: The Lizard Sanction
• X-Men: Empire's End

Tom Clancy's Net Force:

• Virtual Vandals
• The Deadliest Game
• Death Match
• One Is The Loneliest Number
• Runaways
• Deathworld