- Key Service
- Key Ship
- 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: Tales From the Crucible
- Keyria
- Keys
- Keys of Illusion
- Keys of the Origin
- Keys to the Realm
- Keystone Chronicles
- Keystone Girl in the Sunshine State
- Kezzie of Babylon
- Khagan of the Lands
- Khan
- Khandarken Rising, The Last War: Book One
- Khantara: Volume 1
- KHAOS
- Khaotica
- Khari's Tale
- Kharmpurgras Kingdom
- Khashoggi
- Khayl Wildheart and the Rod of Zolaris
- Khârn : Le Dévoreur de Mondes
- Khârn: Verschlinger von Welten
- Khepera Redeemed (Books of Khepera #2)
- Khepera Rising
- Kherishdar's Exception
- Khi to Freedom
- 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)
- Khonsu and the Nightshift
- Khorgos Khul: The Red Feast
- Khorium Martial God
- Khristian and the Mighty Warriors
- Khronnos
- Khrushchev's Second Chance
- Khthelyon
- Khthonios
- Khunchomer Pfeffer - Schattenflüstern
- Khunchomer Pfeffer - Tod auf dem Mhanadi
- Khutulun's Response Ability
- Khârn: Eater of Worlds
- Ki Book One
- Ki Book Three
- Ki Book Two
- Ki Khanga: The Anthology
- Ki: The Complete Series
- 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
- Kibergenezis
- Kick the Candle
- Kicking Ashe
- Kicking Bots
- Kicking Ashe
- Kicking Bots
- Kicking It
- Kicking Sand In The Face Of Jehovah
- Kicking the Desk Job
- Kid A
- Kid Lexington
- Kid Nitro and the Sinister Slorp
- Kidnapped
- Kidnapped by Saurians
- Kidnapped by the Alien Barbarian
- Kidnapped by the Alien Dragon
- Kidnapped by the Barbarian
- Kidnapped by the Dragon
- Kidnapped By The Sheikh (Book 1 of The Desert Sheikh) (Sheikh Romance Trilogy)
- Kidnapped: Three Become One Part 2
- Kidnapped?!! The Continuing Search
- Kidnappers from the Future
- Kidnapping Earth
- Kids Books: Favorite Fables in Prose and Verse
- Kids Books: Tales of Wonder: Every Child Should Know
- Kids Books: The Junior Classics
- Kids Stories: Journeys through Bookland
- Kids Stories: The Junior Classics: Heroes and Heroines of Chivalry
- Kids...They Boot Up So Fast!
- Kiedy Bóg zasypia
- Kieli, Vol. 1 (light novel)
- Kieli, Vol. 2 (light novel)
- Kieli, Vol. 3 (light novel)
- Kieli, Vol. 4 (light novel)
- Kieli, Vol. 5 (light novel)
- Kieli, Vol. 6 (light novel)
- Kieli, Vol. 7 (light novel)
- Kieli, Vol. 8 (light novel)
- Kieli, Vol. 9