- Captain Future #9: Quest Beyond the Stars
- Captain Future and the Space Emperor
- Captain Future's Challenge
- Captain Future: 1,500 Light Years from Home
- Captain Future: The Guns of Pluto
- Captain Goodheart - Against The Power of R.I.M.
- Captain Justo from the Planet Is
- Captain Justo Saga, Captain Justo From the Planet Is Log 1.1: Gold From the Sky
- Captain Justo Saga, Captain Justo From the Planet Is Log 1.2: Dangerous Training
- Captain Justo Saga, Captain Justo From the Planet Is Log 1.3: Homeland Attack
- Captain Justo Saga, Valley of Bones Log 2.1: Into the Deep
- Captain Justo Saga, Valley of Bones Log 2.2: The Seratian Betrayal
- Captain Justo Saga, Valley of Bones Log 2.3: Valley of Bones
- Captain Justo, Valley of Bones
- Captain Kuro From Mars Against The Polluters Comic Strip Book
- Captain Mike
- Captain of the Kali
- Captain Sherwood
- Captain und Commander (Chronik der Sternenkrieger 1-4, Sammelband - 500 Seiten Science Fiction Abent...
- Captain Virtue and The League of Evil
- Captain's Boy
- Captain's Call Book Four
- Captain's Call Book One
- Captain's Call Book Three
- Captain's Call Book Two
- Captain's Final Log Entry
- Captain's Log
- Captain's Memories
- Captive and Consequences
- Captive Scorpio [Dray Prescot #17]
- Captive Universe
- Captives
- Captives in Obscurity
- Captives of the Song
- Captives of the Thieve-Star
- Captivity
- Capture: The Relissarium Wars Space Opera Series, Book 6
- Captured by the Cyborg - Alien Romance
- Captured By The Viking (Rough Reluctant Viking Gangbang)
- Carakenne - A Journey to Nyorfias Novella
- Caravan
- Caravana
- Caravane
- Carbide Tipped Pens
- Carbon Copy
- Carbon Heart Silicon Soul: Books 1 - 3 (Jupiter, Juno, and Juventas)
- Carbon Heart Silicon Soul: Books 4 - 5
- Carboxy
- Carcassonne
- Cardigan
- Cardinal Ignition
- Cardinal Light
- Cardinal Machines
- Cardinal Rule
- Cardinal Spark
- Cardinal Summit
- Cargo
- Cargo 069
- Cargo Cult
- Cargo Wars
- Carl Rogers Is Missing (Side Quest, #4)
- Carl Sagan's Hunt for Intelligent Life in the Universe
- Carmine Rojas: Dog Fight
- Carnaval brutal
- Carne gialla
- Carne o ferro
- Carnival
- Carole Lombard "My Destiny by a Flip of a Coin"
- Caroline
- Carolyn's Circus
- Carosello senza suoni
- Carousel
- Carousel Sun
- Carovana
- Carpathian
- Carrera a través del Espacio
- Carrera a Través del Espacio II: La Ola de Tiempo
- Carrera a Través del Espacio III - El Final de los Tiempos
- Carrick and the Blue Planet - Book Two (Angel Planet Series 2)
- Carrie Anne’s World: An Odyssey through Space and Time
- Carrie Hatchett, Space Adventurer
- Carrie's Calamity
- Carrier
- Carrion Crow
- Carry
- Carry On Constitution
- Carson of Venus SF Gateway Omnibus
- Cartel Robotique : L'intégrale
- Cartoon Heroes: Book One of the Dark Skies Series
- Cartoon: The Comic Book Commando
- Cartwright's Cavaliers
- Carver
- Casa 56
- Cascade
- Cascade Effect
- Case and the Dreamer
- Case of the Missing Coed
- Case Study (Five Fingers)
- Cases Of First Contact
- Casey Agonistes
- Cases Of First Contact
- Casey Agonistes
- Casey Travels West
- Casey's Sunset Lover
- Caspak, monde oublié (cycle de Caspak, 1)
- Cassadaga
- CassaDark
- CassaDawn
- CassaFire
- CassaSeries
- CassaStorm
- Casserole Diplomacy and Other Stories
- Cassie's Troubles
- Cassiopea: il castello (Urania)
- CASSIOPEIA - Das achte Weltwunder (Band 1)
- CASSIOPEIA - Die Botschafter (Band 2)
- Cast a Bright Shadow
- Cast in Sand
- Cast Into New Eden
- Cast Into the Fire
- Castaway Island
- Castaway Odyssey
- Castaway Planet
- Castaway Resolution
- Castaways of Eros
- Castiel Book One: The Origin of Super Baby
- Casting Call
- Castle of Days
- Castle Roogna
- Castle Vroman
- Caszandra: Touchstone Part 3
- Cat
- Cat Chronicles by Bastet Short Story Collection
- Cat Fight
- Cat Ladies Of The Apocalypse
- Cat Refuge
- Cat Salvage
- Cat Tales
- Cat Zero
- Cat's Breakfast: Kurt Vonnegut Tribute
- Cataclysm
- Catacomb Years
- Catacombs
- Catallaxis
- Catalyst
- Catalyst (Star Wars)
- Catapult
- Catarsis
- Catatan (Seorang) Alien Yang Terdampar di Indonesia