- Ultimate Cowboy
- Um Bebê e um Casamento
- Uma Esposa Inconveniente
- Uma esposa substituta
- Uma namorada grávida
- Un amore nuovo (I Romanzi Oro)
- Un bebé y una boda
- Un bel pezzo di manzo
- Un Caliente Crucero Steampunk
- Un corazón por conquistar
- Un cowboy e una canzone country
- Un Cowboy per Sempre
- Un Cowboy Tutto Mio
- Un Cowboy Tutto Per Me
- Un Instant dans le Temps
- Un lys dans la neige
- Un motivo valido
- Un Mysterio por correo
- Un Nuevo Comienzo
- Un Passe Tres Present
- Un revólver y siete rosas (Serie Elizabethtown 1)
- Un tato tra i cowboy
- Un vaquero para navidad
- Un western fantasy - Ysandelle
- Una Casa a Cui Tornare
- Una Cavalcata Selvaggia
- Una Esposa Inconveniente
- Una Esposa Obediente
- Una Gustosa Bistecca
- Una intervención oportuna (Colección Oeste)
- Una Mujer Perversa
- Una Mujer Salvaje
- Una prateria per sé
- Una prateria pericolosa
- Una prateria sconvolta
- Una prateria straniera
- Una promesa peligrosa
- Una sposa di rimpiazzo
- Una sposa incinta
- Una sposa inopportuna
- Una tumba segura (Colección Oeste)
- Unbreak Me
- Unbreakable Love
- Unbridled
- Unbridled and Unbound
- Unbridled and Unbranded
- Unbridled and Unbroken
- Unbridled and Unclaimed
- Unbridled and Undone
- Unbridled and Unforbidden [Prequel to The Double Rider Men's Club]
- Unbridled and Unforgiven: Clay's Story
- Unbridled and Unhitched
- Unbridled and Unjustified
- Unbridled and Unridden
- Unbridled and Unsaddled
- Unbridled and Untangled
- Unbridled and Untethered
- Unbridled Cowboy
- Unbridled Montana Passion
- Unbridled Temptation [Montana Double Riders 1]
- Unbridled Trails
- Unbroken Cowboy
- Uncivil Discord - Clean Historical Western Romance
- Uncle Plats: Clean Cowboy Romance
- Uncle Sarge
- Uncovered
- Undamaged
- Under a Blanket of Blue
- Under A Calico Moon
- Under a Christmas Moon
- Under a Killer Moon
- Under A Prairie Sky: Amish and Cowboy Romance
- Under a Rodeo Moon
- Under Christmas Stars (A Woodlea Novel, #2)
- Under Cover Of Dark
- Under Fire
- Under His Holster [Winchester, Arizona 2]
- Under His Shirt
- Under His Skin
- Under His Spell
- Under Pressure
- Under Shadow Of Doubt
- UNDER SURVEILLANCE
- Under Suspicion
- Under The Autumn Leaves: A Trio of Historical Romance Novellas
- Under the Boss's Mistletoe
- Under the Cowboy's Protection
- Under the Desert Sky
- Under the Greenwood Tree, or, the Mellstock quire; a rural painting of the Dutch school
- Under The Hood
- Under the Mountain Stars
- Under the Outlaw Moon
- Under The Rancher's Protection
- Under the Summer Sky
- Under The Surface
- Under the Tonto Rim
- Under Threat
- Undercover Avenger
- Undercover Outlaw
- Undercover Warrior
- Undercover With The Rancher
- Underneath It All
- Undone by Moonlight
- Une nouvelle vie
- Unexpected Arrangement: A Southern Belle Civil War Romance Short Story
- Unexpected Attraction
- Unexpected Champion
- Unexpected Company
- Unexpected Consequences
- Unexpected Gift
- Unexpected Mommy
- Unexpected Wishes
- Unforeseen Shadows
- Unforgiven
- Unforgiven Spirit
- Uninhibited
- United Again: Book Four in the Montana Series
- Unlikely Angels
- Unlikely Lover
- Unlocking Her Boss's Heart
- UNMARKED MAN
- Unmasking the Maverick
- Unprotected Western Erotic Bundle
- Unridden
- Unscrupulous Wanted
- Unshackled (Slick Rock 28)
- Unspoken Desire [Montana Double Riders 3]
- Unspoken Promises
- Untamed
- Untamed (The Wild Women Series, Book 1)
- Untamed Desire
- Untamed Heart
- Untamed Journey
- Untamed Love
- Untamed Trails
- Untangle My Heart
- Unter den Sternen des Südens
- Until September
- Until...
- Untouched
- Unveiling Beulah
- Unwrapping The Rancher's Secret
- Unyielding Surrender [Montana Double Riders 2]
- Unzipping Levi