- Kitty's Big Trouble
- Kitty's House of Horrors
- Kitty's Mix-Tape
- Kiválasztottak
- Kiya and the God of Chaos
- Kiyama
- Kiyron: Tr Halsien Zjeur - Volume 1 - Awakenings
- Magie pro každého
- Město mrtvých
- Kruté stroje
- Kladivo na čaroděje 09: Žrádlo pro psy
- Kladivo na démony
- Kladivo na čaroděje 11: Bůh strachu
- Kladivo na čaroděje 12: Poslední stadium
- Klam
- Klarissa Dreams Redux: An Illuminated Anthology
- Klauni
- Klaus
- Duell mit dem Teufel
- Die wilde Agneta
- Feuer des Verderbens
- E-Book 1-5
- E-Book 6-10
- Klause Schuar the Grand Bastard (Aevalin and the Age of Readventure, #1)
- Klea
- Kleine Schätze
- Kleinstadt Erforschung
- Klejnoty elfów
- Klenot Pro Šlechtu (Trůn pro Sestry–Kniha pátá)
- Klischees der Phantastik
- Klockverk
- Klone's Stronghold
- Klub død
- Kludde
- Kluzký
- Klątwa burzy (Seria z Mercedes Thompson #11)
- Klątwa Kreatorów
- Klątwa Nawii
- Knave of Blades
- Knaves
- Knead to Know
- Kneževa Iskra
- Knickerbocker4immer - Schatten der Zukunft
- Knife Children
- Knife Fight
- Knife Of Dreams
- Knife of Dreams
- Knife Work: The Blood Princess Saga Book 2
- Knife's Edge
- Knife-Sworn
- Knight Adventure
- Knight and Dex
- Knight and Nightrider
- Knight Angel
- Knight Awoken: The Shackled Verities (Book Four)
- Knight Blazer: Sword of Esoncia - Book 1
- Knight Chosen: The Shackled Verities (Book One)
- Knight Errant
- Knight Eternal
- Knight Exiled: The Shackled Verities (Book Three)
- Knight in the Nighttime
- Knight Life
- Knight Madigan
- Knight Moves
- Knight of Aevalin (Aevalin and the Age of Readventure, #3)
- Knight Of Chaos
- Knight of Corruption
- Knight of Darkness
- Knight of Desire (Vampire Lords #1)
- Knight of Destiny (Vampire Lords #3)
- Knight of Pleasure (Vampire Lords #2)
- Knight of Swords
- Knight of the Black Rose
- Knight of the Blazing Sun
- Knight of the Dead
- Knight of the Demon Queen
- Knight of the Dragon
- Knight of the Dragon Red
- Knight of the Open Road
- Knight of the Realm
- Knight of the Silver Circle
- Knight Parade
- Knight Redeemed: The Shackled Verities (Book Two)
- Knight Rescue
- Knight Takes Pawn
- Knight Time for Paris
- Knight's Dawn
- Knight's End
- Knight's Surrender
- Knight, Heir, Prince (Of Crowns and Glory—Book 3)
- Knight: Tracks of Darkness
- Knighted Heart
- Knightfall
- KnightForce Damian
- KnightForce Ethan
- KnightForce Tres
- Knighthood of the Dragon
- Knightly Serenade
- Knights and Demons Complete: 10-Book Boxed Set
- Knights Keep
- Knights of Alcea (Demonstone Chronicles #1)
- Knights of Arkyla: Sky Knight
- Knights Of Dark Renown
- Knights of Emerald 08 : Fallen Gods
- Knights of Emerald 09 : Danalieth’s Legacy
- Knights of Emerald 10 : Retaliation
- Knights of Emerald 11 : Celestial Justice
- Knights of Emerald 12 : Irianeth
- Knights of Excelter
- Knights of Light
- Knights of Mendolon