- Colonel Rutherford's Colt
- Colonial Commander
- Colonies
- Colonisation: Aftershocks
- Colonisation: Down to Earth
- Colonisation: Second Contact
- Colonization
- Colonization Ring
- Colonizer
- Colony Ascension: An Erotic Space Opera
- Colony Assassin
- Colony Girl
- Colony Holiday: The Complete Series
- Colony in Peril
- Colony Lines
- Colony Lost
- Colony One
- Colony War
- Colony World
- Colony's End
- Colony: A Space Opera
- Colonyside
- Coloring an Apple
- Colors of Power
- Colosseums for Dinosaurs
- Colossus
- Colossus of Chaos
- Colours of Life 1: Schneerot
- Colours of Life 2: Rosengrau
- Colours of Life 3: Nebelschwarz
- Colônia dos esquecidos
- Coma
- Comandante Serralves: Expansão
- Comando Viken
- Combat Earth
- Combatants Will Be Dispatched!, Vol. 1 (light novel)
- Combatants Will Be Dispatched!, Vol. 2 (light novel)
- Combats Afghan épisode deux
- Combined Edition: The Awakened Books Four Through Six
- Combined Edition: The Awakened Books One Through Three
- Combined Service Marines
- Combustion
- Combustion Hour
- Come and Get It
- Come and Take Them
- Come Dance a Cumbia... With Stars in your Hand!
- Come Hell or High Water
- Come ladro di notte
- Come nascono i bambini
- Come the Revolution
- Come un serpente che si morde la coda
- Come Whatever Storms
- Come, Hunt an Earthman
- Come-From-Aways
- Comet Dust: An Apocalyptic Chiller Based on Real Prophecy
- Comet Halley
- Comet Tales
- Comet's Burial
- Comets and Corsets
- Coming Attraction
- Coming Clean
- Coming from Darkness
- Coming Home (Alex Benedict - Book 7)
- Coming Storm - Thorr's Journey
- Coming to You Live
- Coming Together
- Command & Conquer (tm)
- Command And Conquer
- Command Control
- Command Decision
- Commandant Reilly #1: Verre Missie
- Commander Connar (Im Schatten der Sterne)
- Commander Connar (Sternen-Schlag)
- Commander Connar (Träger der Alten Kraft)
- Commander Connar (Vergangene Wahrheiten)
- Commander Reilly #1 - Ferne Mission: Chronik der Sternenkrieger
- Commander Reilly #10: Das Imperium der Arachnoiden: Chronik der Sternenkrieger
- Commander Reilly #11: Verschwörer der Humanen Welten: Chronik der Sternenkrieger
- Commander Reilly #13: Einsatzort Roter Stern: Chronik der Sternenkrieger
- Commander Reilly #14: Im Licht des Roten Sterns: Chronik der Sternenkrieger
- Commander Reilly #15: Die Weisen vom Sirius: Chronik der Sternenkrieger
- Commander Reilly #16: Die Flotte der Qriid: Chronik der Sternenkrieger
- Commander Reilly #17: Ein Raumkapitän der Qriid: Chronik der Sternenkrieger
- Commander Reilly #18: Commander der STERNENKRIEGER: Chronik der Sternenkrieger
- Commander Reilly #19: Eine Kolonie für Übermenschen: Chronik der Sternenkrieger
- Commander Reilly #2 - Raumschiff Sternenkrieger im Einsatz
- Commander Reilly #2 - Raumschiff Sternenkrieger im Einsatz: Chronik der Sternenkrieger
- Commander Reilly #20: Kampfzone Tau Ceti: Chronik der Sternenkrieger
- Commander Reilly #3 - Commander im Niemandsland: Chronik der Sternenkrieger
- Commander Reilly #4 - Das Niemandsland der Galaxis: Chronik der Sternenkrieger
- Commander Reilly #4: Das Niemandsland der Galaxis: Chronik der Sternenkrieger
- Commander Reilly #5: Commander der drei Sonnen
- Commander Reilly #5: Commander der drei Sonnen: Chronik der Sternenkrieger
- Commander Reilly #6: Kampf um drei Sonnen: Chronik der Sternenkrieger
- Commander Reilly #7: Commander im Sternenkrieg
- Commander Reilly #7: Commander im Sternenkrieg: Chronik der Sternenkrieger
- Commander Reilly #8: Kosmischer Krisenherd: Chronik der Sternenkrieger
- Commander Reilly #9: Invasion der Arachnoiden: Chronik der Sternenkrieger
- Commanding the Red Lotus
- Commandos
- Comme un vol de chimères
- Comment la France conquit l'Angleterre en 1888
- Comment les drones vont changer nos vies...
- Comment parle un robot ?
- Comment parler à un alien ?
- Comment penser à l'intérieur de la Boîte
- Commerce Raider
- Common Denominator
- Common Enemies
- Commonwealth, The K'Soth War, Book One
- Commune 2000 AD
- Communication Failure
- Communion
- Community Property
- Como la vida misma
- Como lobos
- Como sobrevivir al fin del mundo
- Compagni a sorpresa
- Companion's Dilemma
- Companions on the Road
- Company Assassin
- Company Daughter
- Company Town
- Compass Rose
- Compendium: A Horror Novelette
- Compete
- Competence
- Competence: Custard Protocol
- Competing Forces: Threats From Above
- Compi Der Kristallplanet
- Complainte pour ceux qui sont tombés
- Complete Adventure Venus Series of Edgar Rice Burroughs
- Complete Complete Great Marvel series of Roy Rockwood
- Complete John Carter of Mars of Edgar Rice Burroughs
- Complete Mystery Science of Cornelius Shea
- Complete Novels
- Complete Science Adventure
- Complete Science Adventure of Fritz Leiber
- Complete Science Adventure of H Beam Piper (Illustrated)
- Complete Science Adventure of Mack Reynolds
- Complete Science Adventure of Murray Leinster
- Complete Science Collection of Marion Zimmer Bradley
- Complete Science Fantasy of Charles Fontenay
- Complete Science Fantasy of Floyd L. Wallace
- Complete Science Fantasy of Henry Kuttner
- Complete Science Fantasy of Hugh Walpole
- Complete Science Fantasy of James Causey
- Complete Science Fantasy of Philip K. Dick
- Complete Science Fantasy of R. A. Lafferty
- Complete Science Fantasy of Raymond F. Jones
- Complete Science Fantasy of Robert Sheckley
- Complete Science Fiction of Garrett Serviss
- Complete Science Fictions of John W. Campbell
- Complete Science Mystery Adventure of Randall Garrett
- Complete Science Mystery Fantasy of Randall Garrett
- Complete Science of Alexander Blade
- Complete Science of Catherine Lucile Moore
- Complete Science of Christopher Grimm
- Complete Science of Frederik Pohl
- Complete Science of H. G. Wells
- Complete Science Pulp Adventure of Homer Eon Flint
- Complete Science Pulp Adventure of Sewell Peaslee Wright
- Complete Science Pulp Mystery of Abraham Merritt
- Complete Science Pulp of Clifford D. Simak
- Complete Science Pulp of George O. Smith
- Complete Science Pulp Skylark of E. E. Doc Smith
- Complete Science Thriller Adventure of Edmond Hamilton
- Complete Science Thriller of Murray Leinster
- Complete Time Traders Science Fantasy of Andre Norton
- Complex
- Complication
- Compound 26
- Compromised Inside
- Computation of Battle: An Agent of The Emperor Science Fiction Short Story
- Computer War
- Computer World
- Comrades in Hope