Series beginning with C
- C.H.I.X.
- C.R.Y.P.T
- Cairo Jim
- Caley Cross
- Call
- Cally and Jimmy
- Calypso Chronicles
- Camelot Rising Trilogy
- Cameron Battle
- Camp Murderface
- Camp Rolling Hills
- Can You See Me?
- Candy Fairies
- Candy Fairies Super Specials
- Candy Wars
- Candymakers
- Captain Cat
- Captain Underpants
- Captain Valiant and Me
- Car-Mad Jack
- Carbonel
- Carey Family
- Carmer and Grit
- Carnival of the Lost
- Carrie Diaries
- Carrowkeel Series
- Cartoon Kid
- Cartoons That Came to Life
- Carver Chronicles
- Case Closed
- Case File 13
- Casebooks of Captain Holloway
- Casper Candlewacks
- Cass and the Bubble Street Gang
- Cassandra Virus
- Casson Family
- Castaways of the Flying Dutchman
- Castle Glower
- Cat in the Hat
- Cat Kid Comic Club
- Cat on the Run
- Cat Royal
- Cate Carlisle Files
- Cathy's Book
- Century
- Chalet School
- Changeling
- Changes
- Chanters of Tremaris
- Chaos Walking
- Charlie
- Charlie and the Chocolate Factory
- Charlie Bass
- Charlie by Hilary McKay
- Charlie Green
- Charlie Joe Jackson
- Charlie Merrick's Misfits
- Charlie Small
- Charlie Thorne
- Charm Hall
- Charmseekers
- Chase
- Chase In Time
- Chasing Vermeer
- Cheeky Charlie
- Cheesie Mack
- Chemical Garden
- Cherry Tree
- Cherub
- Cherub Series 2
- Chestnut Hill
- Chet Gecko
- Chicken Mission
- Chicken Squad
- Children of Exile
- Children of Plynlimon
- Children of the Famine
- Children of the Lamp
- Children of the Red King (Charlie Bone)
- Chitty Chitty Bang Bang
- Chocolate Box Girls
- Choose Your Own Adventure
- Chrestomanci
- Christie and Agatha's Detective Agency
- Christmas Carrolls
- Christmas Elf
- Christmasaurus
- Chronicle of the Dark Star
- Chronicles of Ancient Darkness
- Chronicles of Arokah
- Chronicles of Avantia
- Chronicles of Avonlea
- Chronicles of Egg
- Chronicles of Narnia
- Chronicles of Nick
- Chronicles of Tempus
- Chronicles of the Invaders
- Chronicles of the Kingdom of Prydian
- Chronicles of the Magi
- Chronicles of Vladimir Tod
- Chronoptika
- Chronosphere
- Cinders and Sparks
- Cinnamon Girl
- Circle of Magic Quartet
- Circle of Shadows
- Circle Opens Quartet
- Circus Maximus
- Circus of Thieves
- City Farm
- City of Ghosts
- City Trilogy
- Clara Claus
- Clarice Bean
- Class Pets
- Class Six
- Class X
- Claude
- Clementine
- Clementine Rose
- Clifftoppers
- Clock of Stars
- Clockwork Crow
- Cloud Horse Chronicles
- Cloudberry Castle
- Clouded World Series
- Code Girls
- Code Red
- Codename Conspiracy
- Cogheart Adventures
- Coleen Style Queen
- Collins Children
- Companions Quartet
- Completely Cassidy
- Compton Valance
- Confessions
- Confessions of Georgia Nicolson
- Configured Trilogy
- Conor and the Crossworlds
- Conqueror’s Trilogy
- Conspiracy 365
- Contaminated
- Contender
- Contract
- Cookie
- Cool Code
- Copernicus Archives
- Copernicus Legacy
- Corydon
- Cosima Unfortunate
- Cosmic Cadets
- Cosmic Colin
- Cosmic Creatures
- Courage Chronicles
- Court of Thorns and Roses
- The Cousins
- Cows in Action
- Crabtree School
- Crank
- Crater Lake
- Creature Campers
- Creature from my Closet
- Creature Teacher
- Creeper Files
- Crescent City
- Crier's War
- Crime Biters!
- Crims
- Crooked Oak Mysteries
- Crookhaven: The School for Thieves
- Crossover
- Crow Chronicles
- Cruisers
- Crusher
- Crusoe Adventure
- Crystal Quest
- Cup of the World Series
- Cupcake Diaries
- Curiosity House
- Curious World
- Curse of the Toads
- Curse Workers
- Cursebreaker Series
- Cyber Spooks
- Cyborg Cat