- Castle Dor
- Castle Entime
- Castle Falcon
- Castle Magic And The Sinister Encroaching Fir Wood
- Castle Nowhere
- Castle of Days
- Castle of Power
- Castle of Teskom
- Castle Roogna
- Castle Stone
- Castle Wrath
- Castle's Keep
- Castle, Crown & Conscience
- Castles
- Castles and Caverns II Zeld and the Pirate Prince
- Castles and Caverns: Zeld and the Invaders
- Castles and Kingdoms: Book 2 of Rae's Story
- Castles in the Sky Vessel of Dreams
- Castles of Rosemont
- Castleview
- Castoff World
- Casual Magic
- Casualties of War
- Caszandra: Touchstone Part 3
- Cat & Hound
- Cat & Moused
- Cat And Company
- Cat Burglar
- Cat Call: A Tale of Ghosts and Darker Things
- Cat Chronicles by Bastet Short Story Collection
- Cat Dubh
- Cat Fairy Tales
- Cat Fancy
- Cat Fight
- Cat Fight Portals
- Cat God's Tales
- Cat Hearts Hawk
- Cat in a Zebra Zoot Suit
- Cat in Love: A Pakhet Jones Short Story
- Cat in a Hole: A Pakhet Jones Story
- Cat in Waiting: A Pakhet Jones Story
- Cat Ladies Of The Apocalypse
- Cat Leading the Way: A Pakhet Jones Story
- Cat Leaps
- Cat Life
- Cat o' Nine
- Cat O' Nine Tales
- Cat of 9 Tails
- Cat on the Edge
- Cat on the Money: A Joe Grey Mystery Novella
- Cat on the Prowl
- Cat Out of Hell, Volume III
- Cat Pictures Please
- Cat Raise the Dead
- Cat Refuge
- Cat Salvage
- Cat Sisters
- Cat Tales
- Cat Tales Issue #1
- Cat Tales Issue #2
- Cat Tales Issue #3
- Cat Tales Issue #4
- Cat Under Fire
- Cat Zero
- Cat's Breakfast: Kurt Vonnegut Tribute
- Cat's Call
- Cat's Choice
- Cat's Claus
- Cat's Claw
- Cat's Confidence
- Cat's Cradle
- Cat's Creation (Chronicles of Charlie Waterman #2)
- Cat's Howl
- Cat's Lair
- Cat's Meow
- Cat's Quest
- Cat's Whirld
- Cat-A-Lyst
- Cat-ageddon: The Caterwauling, episode 3
- Cat-Ageddon; The Caterwauling, episode 1
- Cat-Girls Have Four Ears
- Cataclismo
- Cataclysm
- Cataclysm and Rebirth
- Cataclysm
- Cataclysm and Rebirth
- Cataclysm Earth
- Cataclysm, Books 1-4
- Cataclysm: A Lindsey the Bionic Detective Series
- Cataclysm: Return of the Gods
- Cataclysmes
- Catacomb Years
- Catalina Ghost Stories
- Catalisi Cosmica
- Catallaxis
- Catalyst (Star Wars)
- Catalyst (The Passage of Hellsfire, Book 1)
- CATALYST ALLIANCE
- CATALYST and the BEAST MASTER
- CATALYST ANGEL
- CATALYST CRYSTAL
- Catalyst Gate
- CATALYST INFERNO
- CATALYST MIRAGE
- CATALYST NATURE
- CATALYST PHANTOM
- CATALYST SHADOW
- Catalyst: A Collection of Stories
- Catalyst: A Game of Gods Novel
- Catalyst: PORT101 - Book Three
- Catalyst: The Fall of House Ulwyn
- Catalytic Agents
- Cataneo - Der Weg Splendors. Band 1.
- CATAP - Cacciatori di Tesori con l'Aiuto del Paranormale
- CATAP 2 - Il Dopo
- Catapult
- Catara - A Story of the Gefaradan
- Cataracta, tome 3 - Le coeur de rubis
- Catarina
- Catarsis
- Catastrophe
- Catastrophe At Calico
- Catastrophic Attraction
- Catatan (Seorang) Alien Yang Terdampar di Indonesia
- Catati TY Bundle: a collection of 5 short stories