- Contre vents et pirates
- Contristo Constato O Contraste
- Control Alt... Revolution
- Conundrum
- Convergence
- Convergent Paths
- Convergenza: la genesi
- Conversaciones de emigrados alemanes
- Conversations d'une petite fille avec sa poupée suivies De L'histoire de la poupée
- Convertido en una fiera (Colección Oeste)
- Convict B14: A Novel
- Convicted
- Convicted Innocent
- Conviction: A Spectras Arise Novella
- Convoy Cover
- Convoy Duty
- Cookies And Crumbs
- Cool as a Cucumber
- Cool Cat
- Coon Creek
- Cooper's Loot
- Coping with Covid
- Copper and Mercury
- Copper Canyon
- Copper Knights and Granite Men
- Copper Moon
- Copper Tapestry
- Copperhead Junction
- Copping Free
- COPS ON PATROL
- Copy-Cat & Other Stories
- Copyright
- Coragem sem limites
- Corail noir
- Coral Sea Affair
- Coral Sea Story
- Coralín
- Corazones ensangrentados
- Corazones Rotos en el Boulevard Unirii
- Corazón de jazz
- Corazón de las tinieblas
- Corazón de León
- Corazón de plomo (Colección Oeste)
- Corazón de plomo (Colección Oeste)
- Coração de Confiança
- Coração De Oceano
- Corbett
- Cord and Creese
- Cordel Coletivo
- Cordelia Lionheart
- Corduroy Mansions
- Core Punch
- Corellis Geige
- Corey's Return
- Corianton: A Nephite Story
- Coriolano della Floresta
- Corky
- Corky and the Alaskan Bears
- Corky and the Alaskan Gold Digger
- Corky and the Alaskan Oldtimer
- Corky and the Alaskan Quake, A Suspense Novel, The Third Book in the Alaskan Adventure Series
- Corky's Courage An Alaskan Adventure
- Cormorant Crag
- Cormorant Crag: A Tale of the Smuggling Days
- Cornelli wird erzogen
- Cornered
- Cornish Summer
- Cornucopia
- Cornwall's Wonderland
- Coroa de Poder
- Coronado
- Coronado Dreaming
- Coroner Creek
- Corpo Seco E A Legião De Zumbis
- Corporal Cameron of the North West Mounted Police; a tale of the Macleod trail
- Corporal Cotton's Little War
- Corporal Jacques of the Foreign Legion
- Corporal Jacques of the Foreign Legion. 1916
- Corporate America
- Corporate Complicity
- Corporate Defiance
- Corporate Pain
- Corpse on Cape Romain
- Corpus Vile: Death in the City, Chapter 1: The Red Judge
- Corpus X
- Corre hasta el fin del mundo
- Corredora
- Corredores de sombra
- Correggio, venti dal passato
- Corrente Continua
- Correspondance Châtelet
- Corridor
- Corridor One
- Corrupt Congo
- Corrupt Skies: Episodes I-III
- Corrupted Reflection: Episode of Wonder
- Corrupting Virgins
- Corruption
- Corsair
- Corsaire d'hiver
- Corsana
- Corsana: The Phalanx Syndicate
- Corsario (Juan Cabrillo 6)
- Corsaro Nero
- Corsarul Negru
- Cortina De Papel
- Cose dell'Altro Mondo
- Cosimia
- Cosme
- Cosmic Entwinings
- Cosmic Rift
- Cosmic Tales 12: Vagabond
- Cosmic Warrior
- Cosmica: Freund oder Feind
- Cosmicomedia 1 - Montrez-nous que vous n'êtes pas des buses
- Cosmicomedia 2 - La traversée de l'Achéron, Maxime, et le Déluge
- Cosmos
- Cosmosis
- Cosmáquila: O Retorno
- Cossack Cowboy
- Cossack Tales
- Cost of Life
- Cost of Survival
- Cost Price
- Costa maldita (Inspector Pendergast 15)
- Costa sottovento
- Costal l'Indien, ou le Dragon de la Reine