- Undeniable Chemistry
- Undeniable Series
- Undeniably His
- Undeniably Us [Torn Series]
- Undeniably Us: Bass Cole
- Undeniably Yours [Torn Series]
- Under A Prairie Sky: Amish and Cowboy Romance
- Under a Storm-Swept Sky
- Under Her Wings
- Under His Protection
- Under Locke and Key
- UNDER MONTANA SKIES
- Under Pressure
- Under Siege
- Under The Billionaire's Command
- Under The Billionaire's Command 2
- Under The Billionaire's Command 3
- Under The Billionaire's Command 4
- Under The Billionaire's Command 5
- Under The Billionaire's Command 6
- Under The Billionaire's Command 7
- UNDER THE COVERS
- UNDER THE MIDNIGHT SUN
- Under the Millionaire's Influence
- Under The Scars
- Under the Texas Sky (A How We Met Novella)
- Under the Western Sky
- Undercover - In Schwierigkeiten
- UNDERCOVER BABY
- Undercover Billionaire
- Undercover Encounter
- Undercover Intentions
- Undercover mit dem SEAL
- Undercover Passion
- Undercover Sultan
- UNDERCOVER VOWS
- Undercover with the SEAL
- Underneath It All (A Standalone Small Town Romance Book)
- The Christmas One
- Understanding Her Heart
- Understudy
- Undertones
- Undone
- Undone by Deceit
- Undone by Moonlight
- Undone: A Lesbian Love Story
- Undressed
- Une blessure à l'âme
- Une déraison salvatrice
- Une histoire à la con ou le devoir d’être
- Une infirmière bien Prise // New Romance
- Une Kiné très S****e
- Une romance inattendue
- Une seconde chance
- Une semaine pour tout changer
- Une si douce folie - Tome 1
- Une si douce folie - Tome 2
- Une vengeance au goût amer
- Une âme pour la vengeance
- Une âme pour l’expiation
- Unearthly Passion
- Unequally Divided
- UNexpected
- Unexpected Affair
- Unexpected Arrivals
- Unexpected Attraction
- Unexpected Baby
- Unexpected Beauty
- Unexpected Betrayals
- Unexpected Bride
- Unexpected Chemistry
- Unexpected Circumstances: The Handmaid
- Unexpected Encounters
- Unexpected Encounters 2
- UNEXPECTED FATHER
- Unexpected Forfeit
- Unexpected Grace
- Unexpected Lust
- Unexpected Plans
- Unexpected Reunion
- Unexpected Ride: A Dark Mafia Romance
- Unexpected SEAL : Military Romance Collection
- Unexpected Submission - Forbidden Collection of Hottest Explicit Dirty Sex Story
- Unexpected: A Lesbian Love Story
- UNEXPECTEDLY EXPECTING!
- Unexposed
- Unfinished
- Unfinished Business
- Unfinished Business with the Duke
- Unfinished Night -- The Complete Duet
- Unfinished Sympathy
- Unfixed
- Unfold Me
- Don't Date Your Best Friend - A Friends to Lovers Romance
- Don't Date Your Ex Best Friend - A Second Chance Friends to Lovers Romance
- Unforgettable
- UNFORGETTABLE BRIDE
- Unforgettable Kiss : BWWM Romance Collection
- UNFORGETTABLE NIGHT
- Unforgivable Secret
- Unforgivable: The Complete Series
- Unforgotten
- Unhinged
- UnHinged
- Unhinged [The Encounter Trilogy]
- Unhinged Trilogy
- Unicorn's Freedom
- Unida a los Ciborgs
- Unida aos Guerreiros
- Unida com a Fera
- Uninhibited
- Unintended
- Uninvolved
- Union of Death
- Unis par la plume
- University of Gatica - The Complete Series
- University Park Series Box Set
- Unjustified Favor
- Unknown Identity Box Set: Books #1-3
- Unknown Man: Collection of Steamy Interracial Romance Short Stories
- Unlawfully Wedded
- UNLAWFULLY WEDDED
- Unleashed - Colours of Love