- Und der Spaß geht in Venedig weiter
- Und ewig lockt der Vampir
- Und Pestilence macht drei
- Und unter den Birken ein Wasser
- Undead
- Undead - tome 2
- Undead Alchemist
- Undead and Done
- Undead and Unappreciated
- Undead and Undermined
- Undead and Uneasy
- Undead and Unemployed
- Undead And Unfinished
- Undead and Unfinished
- Undead and Unforgiven
- Undead and Unpopular
- Undead and Unreturnable
- Undead and Unstable
- Undead and Unsure
- Undead and Unwary
- Undead and Unwed
- Undead and Unwelcome
- Undead and Unworthy
- Undead Chaos
- Undead Dragon Hunter
- Undead on Arrival
- Undead Philosophy 101
- Undead to the World
- Undead: Vampire Rising (Lust for Blood)
- Undeadly
- Undeadly Sinful: A Jeana Keller, Killer Vamp--er, Vampire Killer--Story
- Undeath and Taxes
- Undeath Ascendant: A Vampire Counts Omnibus
- Undeclared
- Undeniable
- Under
- Under A Celtic Moon (2 Tales of Fantasy Romance)
- Under a Crescent Moon
- Under a Graveyard Sky
- Under A Hunter's Moon (Shadows Over Seattle: Prequels One)
- Under a Raven's Wing
- Under A Shady Sky
- Under A Spell
- Under a Vampire Moon
- Under a Veil of Gods
- Under a Wild and Darkening Sky
- Under a Winter Sky
- Under Cover
- Under Dirt, Water, and Fire
- Under Fallen Stars
- Under Fire
- Under Gravity's Dust
- Under Her Brass Corset
- Under Her Protection
- Under Her Protection: Stories of Women to the Rescue
- Under Her Spell
- Under His Spell (Vampire Desires #2)
- Under jorden
- Under Lock and Key
- Under My Skin
- Under My Skin (Bookburners Season 1 Episode 8)
- Under My Thumb
- Under One Banner
- Under Orders: The Story of a Young Reporter
- Under Raven's Wing
- Under Stars
- Under the Abbey's Angels
- Under the Alaskan Ice
- Under the Andes
- Under the Blood Moon
- Under the Blood Red Moon
- Under the Bones
- Under the Bough
- Under the Bridge
- Under The Broken Sky: The Final Book of the Secret Keeper Series
- Under the Burning Sun
- Under The Cover of Wicca
- Under the Crimson Sun
- Under the Curse of the Lich Queen
- Under the Desert Sky
- Under the Devil's Wing
- Under The Forgotten Oak
- Under the Devil's Wing
- Under The Forgotten Oak
- Under the Full Moon
- Under the Goddess' Eye: A Collection of Short Stories
- Under the Golden Sun: Part One: Tears of Lace
- Under the Golden Sun: Part Two: Colored Ice
- Under the Great Bear
- Under the Green Star
- Under the Gun
- Under the Ice
- Under the Moon
- Under the Moon Bundle
- Under The Moonlight
- Under the Mountain: Book III of The Sword of Bayne
- Under the Mountain: Book Two of the Hawkridge Chronicles
- Under the Papadome
- Under the Polar Star: The Young Explorers
- Under the Radar: A Tale of Super City
- Under the Rainbow
- Under the Red Dragon: A Novel
- Under the Rising Sun
- Under the Rose
- Under the Satyr Moon
- Under the Sea: A Short Story Anthology, Vol. 1 (Summertime Myths and Magic)
- Under the Setting Sun
- Under The Southern Cross
- Under The Stars Of Faerie (Monkey Queen Book Three)
- Under the Stone of Destiny
- Under the Sun
- Under the Sunset and Other Stories
- Under the Tiger's Claws: A Struggle for the Right
- Under the Toadstool
- Under the Veil: A Gay-Ass Fairytale
- Under the Vultures' Moon
- Under the Willow Tree
- Under The Willow Tree
- Under the Willow Tree
- Under the Wolf Moon
- Under the Wolf's Shadow
- Under the World