- Until the Last of Me
- Until the Little Birds Sing
- Until the Night
- Until the Sea Comes Down Again
- Until You..
- Untitled (Strange Allies Novel #6)
- Untitled Bruce Lee/Phil Dick Project
- The Star and the Strange Moon
- Clive Cussler’s Dark Vector
- Forever
- Light Bringer
- Untitled: A Fairy Tale
- UNTITLED: A Short Story
- Unto
- Unto Leviathan
- Unto the Breach
- Unto Zeor, Forever
- Untold Adventures
- Untold Stories from the World of Myrrah
- Untold Tales: Books 1-3
- Untold Tales: Books 4-6
- Untold Tales: The Complete Series
- Untot lebt sichs auch ganz gut!
- Untouchable
- Untouchable (Invincible Chronicles)
- Untouchable Beauty
- Untouchable Girl
- Untouched By Human Hands
- Untrained Fascination
- Untranslatable
- Untrustworthy
- Untruth, Untruth
- Unturned Stones
- Untwirling the Might-Have-Beens
- Unusual 1st Contact Stories
- Unusual Circumstances: Fantastical Short Shorts Vol I.
- Unusual Girl: Qing Ying
- Unusual Happenings: Tales of Death, Dreams and Dimensions
- Unusual Mate : Sci-Fi Alien Romance Collection
- Unusual People
- Unusual Pleasures
- Unusual Practices
- Unusual Suspects
- Unveiling Secrets
- Unveiling Secrets
- Unveiling the Past
- UNVERGÄNGLICH wir (The Curse 3)
- Unverzehrtes Leben
- Unwanted
- Unwanted Ghost
- Unwanted in a a New World
- Unwanted Witch
- Unwashed Fiction
- Unwept
- Unwilling
- Unwilling Souls
- Unwinding the Serpent
- Unwonted Spellweavers
- Unworthy Heroes
- Unwrap Me
- Unwrapped Sky
- Unwritten
- Unwritten Rules of Impossible Things
- Unyielding
- UnZombies
- Un’impresa da eroi (Libro #1 in l’anello dello stregone)
- Uomini della Morte
- Uomini e lupi
- Uomini in rosso (Urania)
- Uomini troppo veri
- Uomo Avvisato, mezzo Salvato
- Uomo in fuga
- Uova Fatali
- Up Above the World So High
- Up Against Mooneye
- Up and Down
- Up From Hell
- Up from Slavery; an Unfinished Journey
- Up from the Deep, Deep Dark
- Up From the Grave
- Up In Flames
- Up in Smoke
- Up in Smoke (Silver Dragons Book Two)
- Up in the Air
- Up In the Air: An Adult Fantasy
- Up North
- Up on the Rooftop
- Up the Airy Mountain
- Up The Walls of the World
- Up the Walls of the World
- Up to Our Asses in Alligators
- Up to the Sky in Ships
- Up to the Toys
- Up with Lo
- Upadek
- Upadła Świątynia
- Upbeats
- Upbeats 2: Crime After Crime
- Updown
- Updraft
- Upgrade: A Metamorphosis of Prime Intellect Short Story
- Upgraded
- Upgrades
- Upgrades - Episode VII
- Upgrading God
- Upheaval
- Upheaval of Feng City
- Upheaval: The Liberation of Zubare
- Upiór
- Upiór południa
- Upiór w ruderze
- Uplift
- Uploaded
- Uploaded on the 4th of July
- Upon (Once 3)
- Upon A Far Distant Shore
- Upon A Midnight Clear
- Upon a Midnight Clear
- Upon a River's Crescent (Volume 3 : The Hurricane Journals)
- Upon A Tide of Wintry Morn
- Upon A Time
- Upon an Alien Shore
- Upon an Alpha Moon Book 2
- Upon an Alpha Moon Book 3
- Upon Another Edge Broken
- Upon Blue Mountain
- Upon the Ashen Blade (The Copper Promise: Part IV)
- Upon the Ashes of Empire
- Upon the Bridge of Falling Frost
- Upon The Dull Earth