- U.S.S. Humanity
- Uchiki
- UFO 1955
- Ugly Earthling
- Uksak Science Fiction Fantasy Großband 6/2019
- Uksak Science Fiction Fantasy Großband 7/2019
- Uksak Science Fiction Fantasy Großband 9/2019 - Ferne Welten, ferne Galaxien
- Ullr Uprising
- Ultimate Awareness
- Ultimate Hack
- Um Toque do Real: Óleo Sobre Tela
- Un bouleversement majeur à venir... dans le monde du travail
- Un comportement exemplaire
- Un espresso dell'avvenire. Nell'anno 2889
- Un fils inattendu
- Un Fulmineo Domani
- Un kiwi dans le cendrier
- Un mundo propio
- Un Nombre Pour Chacun
- Un numero ciascuno
- Un parfum d'addiction
- Un posto lontano: e altri racconti
- Un rêve éveillé
- Un samedi, une horde
- Un soffio di speranza
- Un Taxi a Todos Lados
- Un temps pour naître et un temps pour mourir
- Una
- Una historia de los tiempos venideros
- Una lettera da Dio
- Una rapina in banca
- Una segunda oportunidad
- Una volta ho toccato il cielo
- Unaccompanied Sonata and Other Stories
- Unaltered
- Uncanny Encounters: Roswell
- Uncanny Tales of Crush and Pound 2
- Uncanny Tales of Crush and Pound Annual 1
- Uncertainty
- Unchanging
- Uncharted Frontier EZine Issue 14
- Uncharted Worlds: Xeno Encounters
- Uncle Charlie Goes Swimming
- Uncommon Pet Tales
- Uncovering Truths: Time's Tempest Lost Chapter 4
- Uncrossed Paths
- Undead Tales: 15 Thrilling Zombie Stories
- Under
- Under a Cretaceous Sun
- Under Calcutta
- Under Stars
- Under the Knife (From the Desk of Col. Garrett Ross)
- Under The Tree That Owns Itself
- Under Your Skin
- Underdog Chronicles
- Underway
- Underwood n.º 5
- Underworlds
- Une invasion sans précédent [édition intégrale revue et mise à jour]
- Une Planète
- Une Ville flottante
- Unexpected Aliens
- Unexpected Heroines
- Unfit Magazine: Vol. 1
- Unheard Of
- Unidentified Flying Objects: Nine Classic Sci-Fi Stories
- Unidentified Funny Objects
- Unidentified Funny Objects 2
- Unidentified Funny Objects 4
- Unidentified Funny Objects 5
- Unidentified Funny Objects 6
- Unidentified Funny Objects 7
- Unidentified Funny Objects 8
- Unification In 6066
- Union
- Unique
- United
- Univers transcendental
- Universal Income
- Universal Love
- Universi
- Universi Mondi
- Universo e altre periferie
- Universo in scatola
- Universos en expansión
- Unknown Earth Volume 2
- Unknown for a Reason
- Unleashing A Warrior
- Unlimited Class
- Unlocked Stories
- Unmasked Alloy (Sub-Normal, #2)
- Unnatural
- Uno nessuno centomila
- Unoworld Stories Book 1
- Unplugged
- Unpossible
- Unraveling (After The End #1)
- Unremarkable & Other Stories
- Unspoken Stories
- Unstuck
- Untied Shoelaces of the Mind 2011 Anthology
- Until the End of Days
- Untimely
- Unusual 1st Contact Stories
- Unusual Happenings: Tales of Death, Dreams and Dimensions
- Unwashed Fiction
- Uomini della Morte
- Uomini troppo veri
- Updown
- Upgraded
- Upgrades
- Uploaded
- Upon A Midnight Clear
- Urban Horror Volume 2: Four More Short Horror Stories
- Urban Horror: Doors Short Story by Richard GK Stark
- Urban Nightmares: Tales of Horror and Wonder
- Urknod Army: The Soldier's Manual
- Uroboros
- Usha
- Usher Syndrome
- Utopia Gone
- Utopia morbida
- Utopic Paradigm
- Uzan 3 Tom
- Uzan: Victoria's Story
- Uzun Hikaye