- C'era una volta, ora non c'è più
- C-Vac
- C. C. Blake's Sweaty Space Operas, Issue 10
- C. C. Blake's Sweaty Space Operas, Issue 11
- C. C. Blake's Sweaty Space Operas, Issue 3
- C. C. Blake's Sweaty Space Operas, Issue 5
- C. C. Blake's Sweaty Space Operas, Issue 6
- C. C. Blake's Sweaty Space Operas, Issue 7
- C. C. Blake's Sweaty Space Operas, Issue 8
- C. C. Blake's Sweaty Space Operas, Issue 9
- C. C. Brower Short Story Collection 02
- C.A.I.T.: Cyber Automated Intergrated Technology
- C.A.T.
- C.A.T.S.
- C.A.T.S.P.A.W. Computer Augmented Timeing System Particle Acceleration Weapon
- C.L.O.W.N. 242
- Cabal of Lies
- Caballero Alienígena: Problemas con el oso de felpa
- Caccia all'uomo
- Caccia allo Snark
- Cacesthesia
- Cade Chandra 1: Jäger der Erinnerungen
- Cade Chandra 2: Jäger des Mondsilbers
- Cade Chandra 3: Jäger der goldenen Götter
- Cade Chandra 4: Jäger der Lebensformel
- Cade Chandra 5: Jäger des Mysteriums
- Cade Chandra 6: Jäger der Apokalypse
- Cadeau - Volume I - Who Can You Trust?
- Cadre
- Cael Civilization
- Caelestis Series: Books 1-3 Plus Aelwyd
- Caesar Dies
- Caesar's Jaguar, Chariot Of The God's
- Caged Dreams: A Cyberpunk Science Fiction Short Story
- Caine Black Knife
- Caine's Law
- Caine's Mutiny
- Cakewalk to Gloryanna
- Calamcity
- Calamity
- Calamity's Child
- Calculated Risk
- Calde of the Long Sun
- Caldera 10: Brave New World
- Caldera 11: All Good Things
- Caldera 12: Kingdom Come
- Caldera 5: United We Fall
- Caldera 8: Simon Sez
- Caldera 9: From The Ashes
- Caldera Book 1
- Caldera Book 2: Out Of The Fire
- Caldera Book 3: Return To Yellowstone
- Caldera Book 4: Countdown To Oblivion
- Caldera Book 7: The End Is Here
- Calea speranței
- CalHouse I: Leonis Manor
- CalHouse II: Fort Sacramento
- CalHouse III: The Island
- Caliban
- Caliban's World
- Calico Kids
- Califia's Daughters
- Call Me Joe: Volume 1 of the Short Fiction of Poul Anderson
- Call Me Meola
- Call Me Ogi
- Call Me Pharaoh
- Call Me Wizard
- Call Me Yesterday
- Call My Name
- Call of Destiny
- Call of Destiny (One Small Step out of the Garden of Eden,#1)
- Call of Home
- Call of the Savage
- Call of the Void
- Call to Arms (Star Crusades Nexus, Book 6)
- Calliope
- Calliope 7
- Calliope and the Engine Smith
- Calliope and the Sea Serpent
- Callisto 2.0 A novel of the future
- Callisto Megabundle: The Complete Series (Science Fiction Romance)
- Callisto Switch
- Calvin Blake NeuroCorp
- Cambiamenti
- Camelot 2050
- Camelot Crypto 1- Crypto Genesis
- Camelot Crypto 2- Crypto Odyssey
- Camelot Crypto 3- Crypto Symbiosis
- Camelot Crypto: Three Short Crypto-currency Stories
- Camera Obscura: A Doctor Who short story
- Caminante sin recuerdos
- Camp Despair
- Camp Nameless
- Campfire Chronicles
- Camping on Other Planets
- Campo di maggio
- Camping on Other Planets
- Campo di maggio
- Campo total e outros contos de ficção científica
- Can Hunt
- Can't Shoot Straight Gang
- Can't Shoot Straight Gang Returns
- Canaanabis Roach
- Canal Days
- Cancer Stick Addiction
- Cancer World
- Candid Camera Detective and By Bursting Flash Bulbs: 2 Jimmie Drury Mysteries
- Canis Borg: Alien Control Agent
- Cannabis Alienus 'alien dope'
- Cannabis Paradise
- Canopy of Hope
- Canticle for Calyute
- Canto Bight (Star Wars)
- Capacity
- Cape Town Curios
- Capitan Low
- CAPITAN SIN NOMBRE
- Capoeira: A Tale of Martial Arts Mastery, Mysticism and Love
- Capolinea Città Eterna
- Cappadocia
- Capsule
- Captain
- Captain auf der Brücke - Chronik der Sternenkrieger #1
- Captain Bullard's Deep Space Adventures - 9 Books in One Volume (Golden Age Sci-Fi Saga)
- Captain Cee's Last Stand
- Captain Commander
- Captain Disco: A New Disco
- Captain Flandry: Defender of the Terran Empire
- Captain Future #10: Outlaws of the Moon
- Captain Future #12: The Comet Kings
- Captain Future #13: Planets in Peril
- Captain Future #15: Worlds to Come
- Captain Future #16: The Star of Dread
- Captain Future #17: Magic Moon
- Captain Future #18: Days of Creation
- Captain Future #1: The Space Emperor
- Captain Future #22: The Return of Captain Future
- Captain Future #25: Pardon My Iron Nerves
- Captain Future #26: Moon of the Unforgotten
- Captain Future #28: Birthplace of Creation
- Captain Future #2: Calling Captain Future
- Captain Future #3: Captain Future's Challenge
- Captain Future #6: Star Trail to Glory