- U źródła
- Uczeń czarownicy
- UFO‑landia
- Uitverkoren
- Ullr Uprising
- Ultimate Future
- Ultimate Temptations
- Um Anjo Gótico de Natal (Edição Portuguesa)
- Um Beijo de Morte
- Um Cappuccino Vermelho
- Um sonho na neblina
- Um Toque de Morte
- Uma Lenda, das Férias do Senhor Morte
- Un amore di vampiro
- Un Coeur De La Magie
- Un conflicto sin fin
- Un diabolico visitatore sotto mentite spoglie
- Un fil à travers les nuages
- Un homme venu de loin
- Un libro valioso
- Un Lit, Seuil des Temps!
- Un Lupo Sulla Sua Strada
- Un Noël pas comme les autres
- Un pedazo de luna en el bolsillo
- Un perro callejero
- Un pour taper sur l'autre
- Un rêve en noir et blanc
- Un viaje al infinito
- Un viaje en el metro
- Un Ángel Gótico de Navidad
- Un éternel commencement, tome 1
- Un éternel commencement, tome 2
- Un último conflicto
- Una ayuda inesperada
- Una corona di ferro e argento
- Una Dea in Azione
- Una eredità perversa
- Una favola finita male
- Una profuga anomala
- Una Realidad Separada
- Una vita da... ovvero: le procellarie di Andrea
- Unbeherrscht
- Unberührt
- Unbidden
- Unbinding
- Unbound, A Fallen Novel
- Unbroken
- Uncanny Collateral
- Unchained
- Uncharted Passage: Toward New Realms
- Und der Spaß geht in Venedig weiter
- Undead and Unappreciated
- Undead and Unpopular
- Undead and Unwed
- Undead and Unworthy
- Undead Chaos
- Under Fire
- Under Raven's Wing
- Under the Blood Moon
- Under the Bones
- Under the Bough
- Under the Gun
- Under the Hill: Bomber's Moon
- Under the Hill: Dogfighters
- Under The Willow Tree
- Under the Wolf Moon
- Under the Wolf's Shadow
- Under the World
- Underboss Raphael
- Undercover Gorgon: Episode #0 — Becoming (A Mt. Olympus Employment Agency Miniseries)
- Undercover Gorgon: Episode #1 — Witches War (A Mt. Olympus Employment Agency Miniseries)
- Undercover Gorgon: Episode #2 — Lost & Found (A Mt. Olympus Employment Agency Miniseries)
- Undercover Madness
- UnderWorld
- Une fée sur le balcon
- Unenchanted
- UNENDLICH dein (The Curse 2)
- Unexpected (Viator Legacy Book 1)
- Unexpected Consequences
- Unexpected Critters
- Unexpected Encounters
- Unexpected Old Friend
- Unexpected Peril
- Unexpected Travels
- Unfiction
- Unforgiven
- Unfiction
- Unforgiven
- Unforsaken
- Unfurl
- Ungezähmt
- Ungrateful Heir
- Unholy
- Unholy Ghosts
- Unholy Magic
- Unholy Torment
- Unicorn Luck
- Unicorn Magic
- Unicorn Mates
- Unicorn Seasons
- Unicorn: Journey Beyond Forever
- Unidentified Funny Objects 2
- Unintended Guardian
- Union
- Unite and Conquer: A Royal Academy at Osyth Story
- Unity
- Universal Legacy - Tome 1
- Unleash The Night
- Unleashed
- Unleashing Echoes
- Unnecessary Treasures: Uncommon Synths
- Uno strano primo maggio
- Unquiet
- Unraveled
- Unrequited Love
- Unrest
- Unrewarded Love
- Unscathed
- Unseen Magic
- Unsoul'd
- UNSTERBLICH mein (The Curse 1)
- Unsung Hero
- Untamed Reaper
- Unterbruecken (A Wiener Blut Short Story)
- Untethered
- Untethered: A Magic iPhone Anthology
- Unthinkable
- Until Chelsea Rises