- Ud af skyggen
- UI 101
- Ulvekongen
- Um elefante na sala
- Uma história de verão
- Umberto
- Umbra
- Umbrella Summer
- Un any fora de casa! (Sèrie New York Academy 1)
- Un beso en tu futuro
- Un buco nel cielo
- Un Canto di Natale - A Christmas Carol (Edizione originale con le splendide illustrazioni di Arthur ...
- Un chien pour toujours
- Un clic de trop
- Un courant d'air
- Un dragón con suerte
- Un grosso equivoco
- Un infierno
- Un monstruo viene a verme
- Un Planeta Llamado Ratier/ a Planet Called Thear
- Un séjour inopiné
- Un trabajo sin futuro
- Un vilain guêpier
- Una casa a la deriva
- Una lista peligrosa
- Una ragazza perfetta
- Una semana de siete lunes
- Una serata come le altre
- Una sottile linea rosa
- Una volta ho toccato il cielo
- Una youtuber alla scuola media
- Una Youtuber alla scuola media. L'inizio dei guai
- Unashamed
- Unbecoming
- Unbelievably Boring Bart
- Unbound: A Novel in Verse
- Unbroken
- Uncle Ronald
- Uncle Tom's Cabin
- Uncle Tom's Cabin (Illustrated)
- Unclouded Day
- Und erlöse uns von dem Coolen
- Und morgen ist ein neuer Tag...
- Und plötzlich ist später jetzt
- Und wie geht es mit meinem Leben weiter?
- Undead Girl Gang
- Under Copp's Hill
- Under Emily's Sky
- Under Locker and Key
- Under My Skin
- Under the Arches
- Under the Bottle Bridge
- Under the Dusty Moon
- Under the Influence
- Under the Lilacs
- Under the Same Sky
- Under the Sea With Addie
- Under the Watsons' Porch
- Under the Wolf, Under the Dog
- Underdogs
- Undersea, 2, 3 With Buster and Friends. Numbers for Counting
- Undersea, 4, 5 with Buster and Friends. Numbers for Counting
- Undersea, 6, 7 With Buster and Friends. Numbers for Counting
- Understanding AIDS & HIV
- Understanding Alcohol
- Understanding Depression
- Understanding Fitness
- Understanding Stress
- Understanding Suicide
- UnderWing
- Undiscovered Country
- Undone
- Une chanteuse à Médine et autres contes arabes
- Une croisière mouvementée
- Une vie à quatre vitesses
- Une vraie fille
- Unequal
- Unfiltered
- Unforgettable
- Unfriended
- Unfriendly Competition
- Ungerecht!
- Ungewollt
- Unidentified Suburban Object
- Unintended Rebel
- Uninvited
- Union of Damaron
- Unity Club
- Unleashed
- Unlocking the Future's Past: Book One
- Unmasked
- Unraveling Isobel
- Unschooled
- Unsettled
- Unshakable Hope Promise Book
- Unsichtbare Wunden
- Unsolved Case Files: Escape at 10,000 Feet
- Unspeakable
- Unsung Heroes: Risk Takers
- Unter dem Himmel Australiens
- Until I Find Julian
- Until I’m Safe
- Until Niagara Falls
- Until the Day Arrives
- Until Today
- Un’Mei
- Up and Down the Scratchy Mountains
- Up for Air
- Up for Sale
- Up From Bottom
- Up from Jericho Tel
- Up on Cloud Nine
- Up to Low
- Upgrade U
- Uprooted
- Uprooted: A New Life in the Arizona Sun
- Upside-Down Magic (Upside-Down Magic #1)
- Upstaged
- Uptown Dreams
- Urban Hunters Box Set (Books 1-8)
- Us Regular Students
- Used to Be
- Utopia, Iowa