- Khashoggi
- Kherishdar's Exception
- Ki Book One
- Ki Khanga: The Anthology
- KI Psy 1
- Ki: The Complete Series
- Kibergenezis
- Kicking Ashe
- Kicking Bots
- Kidnapped
- Kidnapped by the Alien Barbarian
- Kidnapped by the Alien Dragon
- Kidnapped by the Barbarian
- Kidnappers from the Future
- Kids...They Boot Up So Fast!
- 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
- Kil'n People
- Kildar
- Kill Baxter
- Kill Before Dying
- Kill by Numbers
- Kill Chain
- Kill Code
- Kill Konfirmed: A Short Story
- Kill Orbit
- Kill Shot: A Remnant of the Commonwealth, Book Two
- KILL THE T-REX!
- Kill the T-Rex! Die Trilogie
- Kill the T-Rex! The Comic
- Kill. Again.
- Killborg
- Killbox
- Killdozer!
- Killer Mate
- Killer, Come Back To Me
- Killercode
- Killerpilze
- Killing Gravity
- Killing London
- Killing Moon
- Killing Moon
- Killing Titan
- Killing Tomorrow
- Killing Violets
- Killing Zombies and Kissing You
- Killzone
- Killzone: Ascendancy
- Killzone: Book 1 of the Shadowkill Trilogy
- Kilt in Space
- Kilts & Kraken
- Kim Jong Undead
- Kimono Coconut
- Kincsesbolygó
- Kind der Legion
- Kind des Glücks
- Kinder der verlorenen Sonne
- Kinder des Donners
- Kinder des Mondes
- Kinderen Van De Rekening
- Kinderen van Duin
- Kindness of Strangers
- Kindred
- Kinetic Cut and Run
- King
- King and Emperor
- King Arthur's Sister in Washington's Court
- King Bullet
- King Dragon
- King Helios - 1 : Le souverain perdu
- King Helios - 2 : Le pirate solitaire
- King of Clubs
- King of Cups
- King of Foxes
- King of Legend
- King of Shards
- King of Spades
- King of Stars
- King of the City
- King of the North
- King of the Worlds
- King Roan: Time Travel
- King Solamet's Mines
- King's Blood Four
- King's Bounty
- King's Hope
- King's Sacrifice
- King's Test
- Kingdom
- Kingdom Bundle: Levels 1-4 LitRPG Epic Fantasy
- Kingdom Come
- Kingdom Come & A Few Other Tales
- Kingdom Level Four: LitRPG Epic Fantasy
- Kingdom Level One: LitRPG Epic Fantasy
- Kingdom Level Three: LitRPG Epic Fantasy
- Kingdom Level Two: LitRPG Epic Fantasy
- Kingdom of Clockwork
- Kingdom of Frankenstein
- Kingdom of the Worlds
- Kingdom River
- Kingdoms of Sorrow
- Kingfisher
- Kingmaker
- Kings & Captives
- Kings of the Dead
- Kingship an Odyssey in Aether Episode 1 Brotherhood of the Strange
- Kingship an Odyssey in Aether Episode 2 Lazarus Goes Forth
- Kingship an Odyssey in Aether Episode 3 The Mad Monk
- Kingston 691
- Kingston's Legacy & Nothing but the Stars
- Kinslayer
- Kinsman
- Kinsman's Oath
- Kinsormagie
- Kipps
- Kipuka Blues
- Kira
- Kira y la Tormenta de Hielo
- Kirall's Kiss
- Kirev's Door
- Kirin Chronicles
- Kirin Diaries
- Kirin Mysteries
- Kirin Shadows
- Kirinyaga
- Kirk: Stargazer Alien Mail Order Brides #10 (Intergalactic Dating Agency)
- Kismet
- Kiss of a Rose
- Kiss the Clones
- Kitt: Stargazer Alien Mail Order Brides #4 (Intergalactic Dating Agency)
- Kitty Raises Hell
- Kiyron: Tr Halsien Zjeur - Volume 1 - Awakenings
- Klara and the Sun: A Novel by Kazuo Ishiguro
- Klara y el Sol
- Kleinzeit