This is a listing of all novels, mostly based on The X-Files but also including adaptations of both films and a canceled series of Millennium novelizations adapting episodes of the series' first season.
The X-Files[]
Juvenile[]
- X Marks the Spot by Les Martin ("Pilot")
- Darkness Falls by Les Martin ("Darkness Falls")
- Tiger, Tiger! by Les Martin ("Fearful Symmetry")
- Squeeze by Ellen Steiber ("Squeeze")
- Humbug by Les Martin ("Humbug")
- Shapes by Ellen Steiber ("Shapes")
- Fear by Les Martin ("Blood")
- Voltage by Easton Royce ("D.P.O.")
- E.B.E. by Les Martin ("E.B.E.")
- Die Bug, Die! by Les Martin ("War of the Coprophages")
- Ghost in the Machine by Les Martin ("Ghost in the Machine")
Young Adult[]
- The Calusari by Garth Nix ("The Căluşari")
- Eve by Ellen Steiber ("Eve")
- Bad Sign by Easton Royce ("Syzygy")
- Our Town by Eric Elfman ("Our Town")
- Empathy by Ellen Steiber ("Oubliette")
- Fresh Bones by Les Martin ("Fresh Bones")
- Control by Everett Owens ("Pusher")
- The Host by Les Martin ("The Host")
- Hungry Ghosts by Ellen Steiber ("Hell Money")
- Dark Matter by Easton Royce ("Soft Light")
- Howlers by Everett Owens ("Unruhe")
- Grotesque by Ellen Steiber ("Grotesque")
- Regeneration by Everett Owens ("Leonard Betts")
- Quarantine by Les Martin ("F. Emasculata")
- Haunted by Ellen Steiber ("Shadows")
- Miracle Man by Terry Bisson ("Miracle Man")
Third Series[]
- Ascension by Quentin Thomas ("Duane Barry"/"Ascension"/"One Breath")
- Hunter by Charles L. Grant ("Colony"/"End Game")
Original Novels[]
- Goblins by Charles L. Grant
- Whirlwind by Charles L. Grant
- Ground Zero by Kevin J. Anderson
- Ruins by Kevin J. Anderson
- Antibodies by Kevin J. Anderson
- Skin by Ben Mezrich
Film Novelizations[]
Millennium[]
- The Frenchman by Elizabeth Hand ("Pilot")
- Gehenna by Lewis Gannett
- Force Majeure by Lewis Gannett
- The Wild and the Innocent by Elizabeth Massie
- Weeds by Victor Koman