- J Alan Erwine's Tales of Dystopia
- J Alan Erwine's Tales of Interstellar Space
- J Alan Erwine's Tales of Mars
- J Alan Erwine's Tales of the Earth and Moon
- J Alan Erwine's Tales of the Solar System
- J Alan Erwine's Tales of Twisted Realities
- J Space River Adventures
- J'ai rêvé d'un autre monde (version intégrale)
- J'ai rêvé d'un autre monde - 15 premiers chapitres
- J'arrête de boire !
- J'en appelle aux Ombres
- J's Atonement
- J's Sorrow
- J. Frost
- J. Frost - Aurora -
- J. Le Protocole des Archanges
- J. M. Barrie Ultimate Collection: 90+ Titles in One Volume (Illustrated)
- J. R. Kruze Short Story Collection 01
- J. R. Kruze Short Story Collection 02
- J. R. Kruze Short Story Collection 03
- J. R. R. Tolkien. Una biografía
- J. Sans ailes, un ange vole moins bien
- J.E.N.N.A
- J.Frost - Penumbra -
- J.J. Green Reading List
- J.J. Jones and the Hawk
- J.K Rowling: Robert Galbraith - Checklist & Summaries
- J.K. Rowling Uses Magic to Turn Transvestites Into Serial Killers
- J.P.P. McLeggins & the Buggin' Out World
- J.R. Ward The Black Dagger Brotherhood Novels 1-4
- J.R. Ward The Black Dagger Brotherhood Novels 5-8
- J.R.R. Tolkien, The Hobbit & The Lord of the Rings: The Life and Legacy of the Author and His Books
- J.S. Cook's Greatest Hits
- J2
- Ja Inkwizytor
- Ja Rel Sunstormer and the Port Controller of Cruzar
- Ja som Smútok
- Ja, Inkwizytor. Bicz boży
- Ja, Inkwizytor. Dotyk zła
- Ja, inkwizytor. Przeklęte kobiety
- Ja, inkwizytor. Przeklęte krainy
- Ja, inkwizytor. Przeklęte przeznaczenie
- Ja, Inkwizytor. Łowcy dusz
- Ja, ocalona
- Ja, powstaniec. (Polish po polsku)
- Jabberwocky Trilogy: Book One
- Jabberwocky Trilogy: Book Two
- Jaben's Rift: Far Land Trilogy #1
- Jabez Payne
- Jabril
- Jacaranda
- Jace's Justice
- Jace: Wolves of the Rising Sun #1
- Jacey's Kingdom
- Jachère
- Jaci's Experiment
- Jacinda's Challenge
- Jacinto's Voyage
- Jack
- Jack & Jill Jump Jakaro
- Jack & Rio
- Jack and Mack in the Quest for the Sword of Fire
- Jack and the Aktuals, or, Physical Applications of Transfinite Set Theory
- Jack and The Beanstalk and Other Fairy Tales
- Jack and the Demonic Disco Ball of Doom
- Jack And The Giant Private Eyes
- Jack and the Magic Beans
- Jack at Sea: All Work and No Play Made Him a Dull Boy
- Jack Barron e l'eternità (Urania)
- Jack Be Nimble
- Jack Cloudie
- Jack Coulter
- Jack Daddy
- Jack Deveraux - Die komplette Serie in einem Band
- Jack Dillon: the Space Drone
- Jack el Destripador que estás en los cielos
- Jack Elopes
- Jack Faust
- Jack Fluke
- Jack Four
- Jack Hurt - La prima stagione completa
- Jack In The Box
- Jack in the Box
- Jack in the Future
- Jack in the Green
- Jack In The Warren
- Jack Jetstark's Intergalactic Freakshow
- Jack Kane and the Kaiser
- Jack Kane and the Statue Of Liberty
- Jack Lightfoot Goes Wild
- Jack Manly: His Adventures by Sea and Land
- Jack North's Treasure Hunt
- Jack of All Trades
- Jack of Coins
- Jack of Hearts
- Jack of No Trades
- Jack of Scurvy Bay
- Jack of Shadows
- Jack of Swords
- Jack of Tabbyshire
- Jack of the Shadowed Eye
- Jack of Thorns
- Jack of Troubles
- Jack Rivers & The Isle of the Immortals
- Jack Ryder
- Jack Scar: And The Rogue of Westwind Isle
- Jack Scarlet: Deepfire
- Jack Shadow
- Jack Shit
- Jack Spartan Varaci Runner
- Jack Sprott Continuum Cop
- Jack Steel Adventure Series Books 1-3
- Jack Straw in Mexico: How the Engineers Defended the Great Hydro-Electric Plant
- Jack Straw: Lighthouse Builder
- Jack Strong
- Jack the Bodiless
- Jack The Demon Hunter: Out Of The Darkness
- Jack the Gargoyle
- Jack The Giant Layer
- Jack The Giant-Killer
- Jack the Giant-Killer (Jack of Kinrowan Book 1)
- Jack Trio 1
- Jack Turnip
- Jack und der Rotschopf mit Twist
- Jack Walters And The Not So Ordinary Day
- Jack's Alive
- Jack's House
- Jack's Paradox A Sci-Fi Writer’s Alien Dilemma
- Jack's Tale
- Jack's Tale:being the third of the Sefuty Chronicles
- Jack's World
- Jack, Off (An Unerotic Short Story)
- Jack-O-Lantern
- Jackal
- Jackalope Wives & Other Stories
- Jackalopes: The Real Story
- Jackals
- Jackals: The Fall of the Children of Bronze
- Jackalwolf
- Jacked Cat Jive
- Jacked-In