- Ultimate Romance Collection
- Um natal encantado
- Uma Ex-Solteirona no Natal
- Un Amante Célèbre
- Un Amore come Quello (Le Cronache dell’Amore—Libro 2)
- Un amore di Natale: cofanetto e-book (Libri 1-3)
- Un Cadeau de Renne
- Un cadeau d’hiver
- Un compositeur dans la vallée des peintres
- Un cuore di vetro
- Un deseo real de Navidad
- Un décembre avec un duc
- Un estafador robó mis chocolates... ¡En Navidad!
- Un joyeux Noël historique
- Un marito finto per Natale
- Un matrimonio a dicembre
- Un minuto prima di mezzanotte
- Un ménage de Noël
- Un Natale con I King
- Un Natale Confetto
- Un Noël à Covent Garden
- Un Sátiro por Navidad
- Un' House-Sitter per Natale
- Una Boda para Navidad
- Una cita en una boda
- Una esposa para Nicholas Claus
- Una GRIM Vacanza
- Una Studentessa a Urbino
- Una vacanza per sempre
- Unas vacaciones en invierno
- UnBearable SEAL (Bear Shifter Navy SEAL Romance)
- UnBEARably Hot Shifters: An 8 Book Paranormal Bear Shifter Romance Collection
- Uncharted
- Und tschüss
- Undamaged
- Undeniably Yours [Torn Series]
- Under A Christmas Moon
- Under a Christmas Sky
- Under a Cornish Sky
- Under a Greek Moon
- Under a New Star
- Under a Tuscan Sky
- Under Christmas Stars (A Woodlea Novel, #2)
- Under Grey Clouds
- Under His Spell
- Under the Christmas Tree
- Under the Clouds of the Night (Golden Deer Original)
- Under the Italian Sun
- Under the Kissing Bough
- Under the Kissing Tree
- Under the Table and Into His Heart
- Under The Tree: Reno and Zuri's First Christmas
- Undercover In Glimmer Creek
- Undercover Princess
- Undercover Santa
- Undisclosed
- Une lady, un baiser, un souhait de Noël
- Une nichée de gentilshommes
- Une nouvelle vie pour Noël
- Une prodigieuse histoire d'amour
- Une promesse pour Noël
- Unexpected Baby
- Unexpected Endings
- Unexpected Holiday Bonus
- Unexpected Surprises: New Beginnings
- Unexposed
- Unfinished Business
- Unfinished Sympathy
- Unforgettable Valentine
- Unfructuous
- Unholy Night
- University of Gatica - The Complete Series
- Unmistakable
- Unprepared Daddy
- Unpublished
- Unsafe Haven
- Unscripted
- Unseen Messages
- Untamed
- Untamed Billionaire's Innocent Bride
- Unter Feuer 2: Weihnachts-Special
- Unter Feuer 3: Weihnachten
- Until Death
- Until Thanksgiving
- Until the Morning
- Unwrapped
- Unwrapped By Her Italian Boss
- Unwrapped By The Duke
- Unwrapped Hearts
- Unwrapping Archie
- Unwrapping Hanie
- Unwrapping The Best Man
- Unwrapping The Neurosurgeon's Heart
- Unwrapping the Present
- Unwritten
- Up on the Housetop
- Upon a Midnight Clear
- Upon a Midnight Clear and Season of Joy
- Upon a Midnight Clear: A Regency Christmas Novella
- Upon a Winter's Star: A Pride & Prejudice Holiday Variation
- Us Three
- Utolsó levél haza