- J Space River Adventures
- J'ai rêvé d'un autre monde (version intégrale)
- J'ai rêvé d'un autre monde - 15 premiers chapitres
- J.J. Green Reading List
- J2
- Jabez Payne
- Jack Commer, Supreme Commander
- Jack Coulter
- Jack Daddy
- Jack Four
- Jack of No Trades
- Jack Scarlet: Deepfire
- Jack Strong
- Jack the Bodiless
- Jack The Demon Hunter: Out Of The Darkness
- Jack Trio 1
- Jack Williamson SF Gateway Omnibus
- Jack's World
- Jackpot
- Jacks Company
- Jacob Wesley and the Darklights
- Jacob's Bridge
- Jacob's Log
- Jade Darcy and the Affair of Honor
- Jade Darcy and the Zen Pirates
- Jadeträne
- Jadis chez aujourd'hui
- Jaguar IV
- Jaguar Transit
- Jake "X" (2) One Way Ticket
- Jake & Chearice: Lightspeed
- Jake and the Treasure of Solomon Lake
- Jaleenas zweites Leben (Teil 1)
- James Flamestar and the Stargazers
- James Phoenix and the Egyptians
- James Sapphire’s Amazing Shrinking Machine
- James Winter: Beginnings
- Jamestown: Book 2 of The Shadow War Chronicles
- Jamieson
- Jan And The Spooky Periscope Incident - The First Two Stories
- Jane 8086 Part Five
- Jane 8086 Part Four
- Jane 8086 Part One
- Jane 8086 Part Three
- Jane Grace: Library of Light
- Janus
- Janus Arrival: Journey's End
- Janus Challenge: The Journey
- Janus Is A Two-Faced Moon
- Janus Is A Two-Headed God
- Janus the Arrival
- Janus the Offspring
- Janus the Sandlings
- Japan Folklore Vol. 3 The Fisherman & Beautiful Princess
- Japanese Folklore Lady of The South Wind
- Japanese Folklore The Story of Love & Reincarnation
- Japanese Folklore The Tale of Young Samurai & Beautiful Ghost
- Jaq's Harp
- Jaradee's Legacy
- Jaran
- Jarl
- Jarl of Orion: A Cosmic Adventure! - A Quick Read Book
- Jarl on Faruul (Origins Part 6)
- Jarzen Tadel - Echoes of Alchemy
- Jarzen Tadel - Echoes of Chaos
- Jarzen Tadel - Echoes of Destiny
- Jarzen Tadel - Echoes of Peace
- Jarzen Tadel Echoes of Freedom
- Jarzen Tadel Echoes of Replication
- Jason and the Dog Star Pack
- Jason Kindle
- Jason Son of Jason
- Jason, The First Cyborg
- Jaws of Darkness
- Jaws of Death
- Jaydium
- Jazz
- Jazz, Monster Collector in: A Friendly Place of Dying (season 1, episode 5)
- Jazz, Monster Collector in: Broken (season 1, episode 17)
- Jazz, Monster Collector in: Creatures and Clowns (Season One, Episode Two)
- Jazz, Monster Collector in: Down with the Clowns (Season 1, Episode 15)
- Jazz, Monster Collector in: Downtown Clowntown (Season One, Episode Three)
- Jazz, Monster Collector in: Man Behind the Curtain (Season 1, Episode 16)
- Jazz, Monster Collector in: Of Fai, Fire, and Fur (season 1, episode 6)
- Jazz: Monster Collector In: Crime Scenes (Season 1, Episode 9)
- Jazz: Monster Collector In: Dogfight (Season 1, Episode 14)
- Jazz: Monster Collector In: Jazz Attacks (Season 1, Episode 12)
- Jazz: Monster Collector In: Promise Kept (Season 1, Episode 13)
- Jebidiah Smith: The Horror of Tilbost House
- Jedi Search: Star Wars (The Jedi Academy)
- Jegra Destroyer of Galaxies
- Jegra Gladiatrix of the Galaxy
- Jegra Imperatrix of the Galaxy
- Jehad
- Jemma 7729
- Jenna Starborn
- Jennings' Folly
- Jenny In Space: Chasing The Killer Comet
- Jenny In Space: The Snake Riders of Spacemark Four
- Jenseits aller Galaxien: Science Fiction Sammelband
- Jeph's Daughter
- Jeremiah Willstone and the Clockwork Time Machine
- Jeremy Raybourne: The Genesis Dawns (Book Two: Journey To The New Awakening)
- Jericho Falling
- Jesus Christ and the Broken Microwave Oven
- Jesus Christ Fundamentalist Christian Slayer
- Jet il Grigio
- Jetta of the Lowlands