- Unclear Skies
- Uncommon
- Uncommon Life
- Uncompromising Honor
- Unconquerable Sun
- Unconstant Love
- Und deine Welt, John?
- Und führet mich zu stillen Wassern
- Und wenn die Mahner doch Recht hatten?
- Und übrigens noch was ...
- Undead Island (Escape - Vol. 3)
- Undead Island (High Tide - Vol. 1)
- Undead Island (The Lighthouse - Vol. 2)
- Undead Island: The Complete Collection
- Undead Reckoning
- Undead Tales: 15 Thrilling Zombie Stories
- Undead Worlds
- Undead Worlds 2
- Undead Worlds 3
- Under a Fallen Sun
- Under a Veil of Gods
- Under an Open Sky
- Under den döende stjärnan
- Under Foot
- Under Fyre
- Under Her Brass Corset
- Under New Leadership
- Under Roswell
- Under Shadows
- Under Siege: A Post-Apocalyptic Zombie Thriller
- Under Snow and Stars
- Under the Ancient Suns
- Under the Andes
- Under the Blackberry Vines
- Under the Blue
- Under the Dark
- Under the Dome
- Under the Flickering Light
- Under the Green Star
- Under the Heel of the Aether Imperium
- Under the Light: Sandes Chronicles Book 1
- Under the Rushes
- Under The Shell
- Under The Skin
- Under the Skin
- Under the Sunset
- Under Two Moons: Paradisi Chronicles
- Under Two Moons: Paradisi Chronicles
- Under underjorden
- Under vingarnas skugga
- UNDERBREAK
- Undercity
- Undercurrents
- Underdogs
- Underestimation
- Underground
- Underground Bride
- Underground Heat Complete Series
- Underground Man
- Undergrowth
- Undermajordomo Minor
- Undermind
- Undersea Fleet
- Undersea Quest
- UnderSilver
- Understanding the Misunderstood
- Undertow
- Underwater Restorations: A Sunken City Capers Novelette
- Underway
- Underworld
- Underworld Climbers
- Underworld: Rise of the Lycans
- Undiscovered Title
- Undone
- Undying Sacrifice
- Une Femme Pour Deux
- Une histoire des temps à venir
- Une nuit à Los Angeles
- Une odeur de sainteté
- Une Princesse de Mars (Cycle de Mars n° 1)
- Une princesse de Mars (Le conquérant de la planète Mars)
- Une seconde chance
- Une sorte de nitescence langoureuse
- Une ville flottante
- Une Ville flottante
- Une Ère Nouvelle
- Unearthed Treasure
- Unearthly Neighbors
- Unendliche Stadt
- Unendlichkeit
- Unenpäästäjä Florian
- Unexpected Alien in Bagging Area
- Unexpected Aliens
- Unexpected Bride
- Unexpected Contact
- Unexpected Encounters
- Unexpected Futures
- Unexpected Hope
- Unexpected Rain
- Unexpected Unplanned and into the Unknown
- Unexpected Warrior
- Unexpected: An Alien Romance
- Unfiction
- Unfit Magazine: Vol. 2
- Unfit Magazine: Vol. 3
- Unforgettable
- Unforgiven: A Tale of the Possessed
- Unfriendly Persuasion: A Tale from the Arbiter Chronicles
- Unicorn Mountain
- Unicornio Violento
- Unida a la bestia
- Unida a los Ciborgs
- Unida a los guerreros
- Unida a los Viken
- Unida aos Guerreiros
- Unida com a Fera
- Unidentified
- Unidentified Funny Objects 3
- Unification
- Uniform of a Man
- Unintended Matter
- Union
- Union d'un destin - Pouvoirs secrets tome 1
- Union Forever
- Unita alla bestia
- United
- United As One
- United States Of Apocalypse 2: Razed Country
- United We Stand
- UniteDead Kingdom
- UniteDead Kingdom 2
- Unity
- Universal Language
- Universe Hunters: Taken
- Universi
- Universums ark
- Universums mörka hemlighet
- Unjust Theft
- Unknown Country, The Trilogy