- Universum
- Universums mörka hemlighet
- Univerzita výnimočných 3 - Odveta
- Unjustified Favor
- Unknown Country, The Trilogy
- Unknown Elves
- Unknown Guardians
- Unknown Horizons
- Unknown Relams
- Unknown Revenge
- Unknown Taste
- Unknown Worlds
- Unleash
- Unleash The Darkness
- Unleash the Inferno
- Unleash the Night
- Unleash The Night
- Unleashed
- Unleashed (The Elements Trilogy, #3)
- Unleashed by her Bear
- Unleashed by the Moon
- Unleashed Dragon
- Unleashed Fury (BloodRunes
- Unleashed Legends: Blood in the Water
- Unleashed Valkyrie
- Unleashed, Fae Shifters 2
- Unleashed: Book One of the Saga of Ruination
- Unleashed: explicit stories of wild love and magic
- Unleashing Echoes
- Unleashing Iron
- Unleashing Julia: Mind Games Series Book 2
- Unleashing the Gods
- Unleashing the Shadows
- Unlife
- Unlight - L'histoire de la carte rare
- Unlight L'histoire de la carte rare
- Unlight RareCard Story
- Unlikely Heroes
- Unlimited Online Game
- Unlit
- Unlocked: The Door Book Two
- Unlocking Her Chances
- Unlocking Her Doubts
- Unlocking Her Dreams
- Unlocking Her Grace
- Unlocking Her Heart
- Unlocking Her History
- Unlocking the Devil
- Unlovable
- UNLOVELY
- Unlucky Charm
- Unlucky in Love
- Unlucky Stiff
- Unlucky Terror
- Unmagic
- UnMasked
- Unmasking
- Unmasking Of A Lady
- Unmoored
- UnNamed
- Unnamed Memory, Vol. 1 (light novel)
- Unnamed Memory, Vol. 2 (light novel)
- Unnamed Memory, Vol. 3 (light novel)
- Unnamed Memory, Vol. 4 (light novel)
- Unnamed Memory, Vol. 5 (light novel)
- Unnatural
- UNNATURAL DISASTER
- Unnatural Immortal
- Unnatural Magic
- Unnatural Temptation Vol. I
- Unnecessary Noises
- Unnecessary Treasures: Uncommon Synths
- Uno scheletro sepolto
- Uno Schiavo A Lupi
- Uno strano paese
- Uno strano primo maggio
- Uno, due e tre...racconti fantastici
- Unofficial School Business
- Unorthodox
- Unparalled Demon Lord
- Unparalled Immortal Clan
- Unparalled Sovereign
- Unparallel Worlds
- Unparalleled Affairs
- Unparalleled Emperor of Immortal World
- Unpleasant Desires
- Unpleasant Stalker
- Unprojected Images
- Unquenchable Desires
- Unquiet
- Unquiet Land
- Unquiet Skies
- Unquiet Land
- Unquiet Skies
- Unravel the dusk
- Unravel the Dusk
- Unraveled
- Unraveled Homecoming
- Unraveled Together
- Unreachable Skies
- Unreal Magazine: Vol. 1
- Unreal Magazine: Vol. 2
- Unreal Shadow
- Unreal World Dream
- Unremarkable
- Unrequited Death
- Unrest
- Unrewarded Love
- Unruly Magic (Book 2, Stella Mayweather Series)
- Unruly Souls: Three Tales of Portland
- Unruly Stunning Consort
- Unsafe, Unsound
- Unsavory: An Indigenous Horror Short Story
- Unscathed
- Unseelie Queen
- Unseen
- Unseen Beauty
- Unseen Bonds
- Unseen Lord
- Unseen Magic
- Unseen Terror
- Unseen Things
- Unseen Warfare
- Unseen Worlds
- Unseen: Chronicles of the Royal Society for Investigation of the Paranormal
- Unser Weg zur Ewigkeit
- Unsere Hochzeitsreise in die Urwälder von Kamerun
- UNSETIC FIles: Between Fang and Claw
- UNSETIC Files: The Measure of Dreams
- Unsettled Scores
- Unsettling Things & Other Stories
- Unsoul'd
- Unspeakable Joy
- Unspeakable Rites: An Alkemya Novella
- Unspent Time - Omnibus
- Unspoken
- UnSpoken: A Val and Irulan Short