- Uncle Silas
- Uncle Silas (Horror Classic)
- Uncommon Ground
- Uncommon Lust
- Uncommonly Verdant
- Unconditional Love
- Uncontrollable
- Unconventional in San Diego
- Unconventional Mate [Katzman 5]
- Unconventionally Cheeky [A More Perfect Union 3]
- Uncovering Camelot
- Und dann gehört die Zeit uns
- Und ewig lockt der Vampir
- Und unter den Birken ein Wasser
- Undaunted
- Undead
- Undead and Unappreciated
- Undead and Undermined
- Undead and Underwater
- Undead and Undone
- Undead and Uneasy
- Undead and Unemployed
- Undead and Unfinished
- 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 Girlfriend: A Lesbian Ghost Story
- Undead on Arrival
- Undead Or Alive
- Undead Tango
- Undead Uprising
- Undead Uprising War Approaches
- Undefeated
- Undeniable Bonds
- Undeniably Yours
- Undenied
- Under
- Under A Blood Kissed Moon (Book 1 - BloodMoon & Magic)
- Under a Blood-red Moon
- Under a Blue Moon
- Under a Breeding Moon (Shapeshifter Breeding Erotica)
- Under A Celtic Moon (2 Tales of Fantasy Romance)
- Under A Celtic Moon (Book 2 - BloodMoon & Magic)
- Under a Confederate Moon
- Under a Mating Moon
- Under A Million Stars
- Under a New Star
- Under a Raging Moon: Part One
- Under a Raging Moon: Part Three
- Under a Raging Moon: Part Two
- Under a Vampire Moon
- Under a Winter Sky
- Under Cover Of The Moon
- Under Fire
- Under Five
- Under Her Brass Corset
- Under Her Covers
- Under Her Protection: Stories of Women to the Rescue
- Under Hill (Aos Si, #2)
- Under His Claw
- Under His Dominance
- Under His Holster [Winchester, Arizona 2]
- Under His Spell
- Under His Spell (Vampire Desires #2)
- Under His Wing
- Under Lock and Key: A Story (Complete)
- Under Orders
- Under Sean's Protection
- Under Siege
- Under St Paul's: A Romance
- Under Starlight
- Under Strain
- Under the Alpha's Protection
- Under the Big Dipper
- Under the Blackberry Vines
- Under the Blood Red Moon
- Under the Blue Moon
- Under the Bridge
- Under The Broken Sky: The Final Book of the Secret Keeper Series
- Under the Christmas Tree
- Under The Cove
- Under the Christmas Tree
- Under The Cove
- Under the Gun (King of Hearts Five)
- Under the Hill: Bomber's Moon
- Under the Hill: The Full Story
- Under the Ice
- Under the Ice Blades
- Under the Lion's Curse
- Under The Midnight Sun
- Under The Moonlight
- Under the Oak
- Under the Panther's Protection [Black Panthers 3]
- Under the Pink Sky
- Under The Rainbow: A St. Patrick's Day Story
- Under the Riptides
- Under the Rushes
- Under the Satyr Moon
- Under the Sunset
- Under the Witches Moon
- Under Witch Aura
- Undercity Chronicles 1
- Undercover
- Undercover Desire
- Undercover Lovers [Urban Affairs 1]
- Undercover Magic
- Undercover Professor
- Undercover Shenanigans
- Undercover Snake
- Undercover Trouble
- Undercover Wolf
- Undercovers
- Underground
- Underground Bride
- Underground Heat Complete Series
- Underground Spirit
- Underhill
- Underland
- Underneath [The Angel Pack 5]
- UnderSilver
- Underwolves
- Underworld
- Underworld Lover