- Kevätkukka Perhetarina
- Kewarratiwa's Story
- Key Of Light
- Key of Pearl
- Key of Stars
- Key of the Phantasm
- Key Out of Time
- Key Service
- Key Stone Princess
- Key the Steampunk Vampire Girl and the Dungeon of Despair
- Key the Steampunk Vampire Girl and the Tower Tomb of Time
- Key to Conflict
- Key to Conspiracy
- Key to Destiny
- Key to Justice
- Key to Redemption
- Key to the Past
- Keyboard in the Sky
- Keychain's Destiny
- Keyflame
- KeyForge - Racconti del Crogiolo
- Keyria
- Keys
- Keys of Illusion
- Keys of the Origin
- Keys to the Realm
- Keystone Chronicles
- Khaar vzdorující
- Khagan of the Lands
- Khai Of Khem
- Khamel
- Khantara: Volume 1
- Khaotica
- Khari's Tale
- Kharmpurgras Kingdom
- Khayl Wildheart and the Rod of Zolaris
- Khepera Redeemed (Books of Khepera #2)
- Khepera Rising
- Kherishdar's Exception
- Khing and the Magic of Black and White: Book One Ash Makes Friends
- Khing and the Magic of Black and White: Book Three Ash Makes a Wizard
- Khing and the Magic of Black and White: Book Two Ash Makes War
- Khloe's black sheets
- Khokhan: The Kid Who Could Be! (Volume 1)
- Khorgos Khul: The Red Feast
- Khorium Martial God
- Khristian and the Mighty Warriors
- Khronnos
- Khrushchev's Second Chance
- Khthonios
- Khunchomer Pfeffer - Schattenflüstern
- Khunchomer Pfeffer - Tod auf dem Mhanadi
- Ki Book Three
- Ki Book Two
- Ki Khanga: The Anthology
- Kia and Gio
- Kiamichi Voices
- Kiara
- Kiaras saga 1- Skytsånden
- Kiaras saga 2 - De tre søstre
- Kiaras saga 3 - Der brænder en ild
- Kibbles and Bits
- Kick the Candle
- Kicking It
- Kicking Sand In The Face Of Jehovah
- Kid Lexington
- Kidnapped
- Kidnapped by Saurians
- Kidnapped by the Dragon
- Kidnapped By The Sheikh (Book 1 of The Desert Sheikh) (Sheikh Romance Trilogy)
- Kidnapped, Being Memoirs of the Adventures of David Balfour in the Year 1751
- Kidnapped: Three Become One Part 2
- Kids Books: Favorite Fables in Prose and Verse
- Kids Books: Tales of Wonder: Every Child Should Know
- Kids Books: The Junior Classics
- Kids In King Arthur's Court
- Kids of the Aztec Tombs
- Kids of the Baskervilles Trilogy
- Kids of the Caribbean
- Kids On Her Majesty's Secret Service
- Kids On Mars
- Kids On Monster Island
- Kids Stories: Journeys through Bookland
- Kids Stories: The Junior Classics: Heroes and Heroines of Chivalry
- Kids X
- Kiedy Bóg zasypia
- Kieron's Tale
- Kiesha Tome 1
- Kigaea
- Kii
- Kiirean Incorporeal
- Kiki la petite sorcière, T5
- Kiki, la petite sorcière - Livre 1
- Kiki, la petite sorcière - Livre 2
- Kiki, la petite sorcière - Livre 3
- Kiki: Perfectly Imperfect
- Kikimora Courtois
- Kikki
- Kilaal's Sword
- Kilgore's Five Stories #11: June 2021
- Kilgore's Five Stories #12: July 2021
- Kilgore's Five Stories #8: March 2021
- Kilhaven Police: Books 1-3
- Kili
- Kilig the Sword
- Kill City Blues
- Kill Creek
- Kill Game
- Kill Happy
- Kill It With Magic
- Kill Jill (Darkworld)
- Kill Me Next Week (Liz Baker, Book 2)
- Kill Shot
- Kill the Beast
- Kill the Dragon
- Kill the Farm Boy
- Kill the Moon
- Kill the Past, Destroy the World
- Kill the Queen
- KILL THE T-REX!
- Kill the T-Rex! Die Trilogie
- Kill Them All
- Killashandra