- Undeniably Yours [Torn Series]
- Under a Starry Sky
- Under a Tuscan Sky
- Under Deepest Cover
- UNDER FIRE
- Under Her Influence
- Under Her Skin: A Bad Boy Billionaire Romance
- Under Her Spell
- Under His Skin
- UNDER MONTANA SKIES
- Under Parr
- Under Pressure (Redwood Ridge 5)
- Under the Bali Moon
- UNDER THE BOARDWALK
- Under the Boardwalk
- Under the Boss's Mistletoe
- Under The Cove
- UNDER THE COVERS
- Under the Italian Sun
- Under the Italian's Command
- Under the Kilt Bundle
- Under the Kissing Tree
- UNDER THE MIDNIGHT SUN
- Under the Mistletoe with John Doe
- Under the Stars
- Under the Table
- Under The Tonto Rim
- Under the Western Sky
- UNDERCOVER BABY
- Undercover Billionaire
- Undercover Bromance
- Undercover Cook
- UNDERCOVER COWBOY
- UNDERCOVER DAD
- Undercover Daddy
- UNDERCOVER DADDY
- Undercover Engagement
- Undercover Father
- UNDERCOVER FIANCE
- UNDERCOVER HUSBAND
- Undercover in Venice Beach
- Undercover Küsse
- UNDERCOVER LOVERS
- Undercover Match
- Undercover Passion
- Undercover Professor
- Undercover Protector
- Undercover Santa
- Undercover Shenanigans
- Undercover Sultan
- Undercover Trouble
- UNDERCOVER VOWS
- Undercover with the Mob
- Underground Warrior
- Underneath the Christmas Tree
- UNDISCOVERED HERO
- Undone
- Undone by Moonlight
- Undone by the Star
- Undressed
- UNDYING LAUGHTER
- Une année de grandes vacances
- Une Dame Et Un Homme De La Mer
- La mémorable montagne
- Une famille pour noël
- La joyeuse randonnée
- Une maison de rêve
- Une rencontre déjà-vue
- Une rencontre et sauve-qui-peut
- Une rencontre intéressée
- Une semaine pour tout changer
- Une Éducation Sexy
- Unerwartete Liebe: Eine Fake-Beziehungs-Romanze
- Unexpected
- UNEXPECTED BABIES
- Unexpected Bliss
- Unexpected Bride
- UNEXPECTED FATHER
- Unexpected Grace
- Unexpected Holiday Bonus
- UNEXPECTED MARRIAGE
- Unexpected Rescue
- Unexpected Trust
- UNEXPECTEDLY EXPECTING!
- Unexpectedly Mated
- Unexpectedly Mine
- Unexposed
- Unfinished Business
- Unfinished Business with the Duke
- Don't Date Your Ex Best Friend - A Second Chance Friends to Lovers Romance
- Unforgettable
- UNFORGETTABLE BRIDE
- Unforgettable In Love (The Maverick Billionaires, Book 7)
- UNFORGETTABLE NIGHT
- Unforgettable In Love (The Maverick Billionaires, Book 7)
- UNFORGETTABLE NIGHT
- Ungezähmter Rockstar: Ein Milliardär - Liebesroman
- Unguarded
- Unhinged
- Uninhibited
- Unintended
- United by Their Royal Baby
- Unknown
- Unknown Identity Box Set: Books #1-3
- UNLAWFULLY WEDDED
- Unleashed
- Unleashed: Case of the Dalmatian Salvation
- Unleashed: Case of the Hound About Town
- Unleashed: Case of the Pom Poms
- Unleashed: Case of the Poodle Doodle
- Unleashed: Case of the Shepherd's Pie
- Unleashing Mr. Darcy
- Unlikely Lover
- Unlikely to Fall
- Unliving the Dream
- Unlocking the Surgeon's Heart
- UnLoved Forever
- Unlovely Things
- Unmasked
- Unmasking Maya
- Unmasking The Maverick
- Unmasking the Maverick Prince
- Unnatural Disaster
- Unplanned Party
- Unpublished
- Unraveling Fayth
- Unscharfe Männer
- Unscrewed
- Unser Haus am Meer & Ein Sommer im Rosenhaus
- Unsolicited Advice
- UNSPOKEN CONFESSIONS
- Unspoken Desire
- Unspoken Words
- Unsuitable
- Unsure
- Unsweetened
- Untameable Rogue
- Untamed Love
- Unter Feuer 2: Weihnachts-Special
- Unter Feuer 3: Weihnachten