- O Clube de Menáge de Feriado
- O Peso da Magia
- Obeying Mr. Kringle
- Obeying My Mistress Bundle
- Obsessed
- Ochi În Întuneric (Jumatatea Perfecta, #2)
- Odessa
- Of Printers and Presents
- Offside: A Bad Boy Sports Romance
- Oh What A Christmas
- Oh! Katherine
- Oh, Christmas Night
- Oh, Christmas Tea
- Oh, Gingersnap!
- Okavango Angel
- Old Acquaintance
- Old Acquaintances
- Old Country Surprises
- Old Long Since
- Omega's Baby for the Beach Bear
- OMG Christmas Tree
- On a Cold Christmas Eve
- On a Midnight Clear
- On a Snowy Christmas
- On a Snowy Christmas Night
- On Christmas Tree Cove
- On Her Naughty List
- On His Knees
- On His Naughty List
- On That Autumn Day
- On The Eve...
- On the Highway
- On the Line
- On the Naughty List
- On the Wings of a Winter Heart
- On the Wings of an Angel
- Once a Hero
- Once in a Blue Moon
- Once in a Lifetime
- Once More with Love: A Short Story
- Once Upon a Beauty
- Once Upon a Christmas
- Once Upon a Christmas Eve
- Once Upon a Christmas Kiss
- Once Upon a Cowboy Christmas
- Once Upon a Duke
- Once Upon a Groom
- Once Upon a Highland Christmas
- ONCE UPON A HOLIDAY
- Once Upon a Kiss
- Once Upon a Kiss Gone Horribly Wrong
- Once Upon a Plaid
- Once Upon a Proposal
- Once Upon a Romance
- Once Upon a Texas Christmas
- Once Upon a Winter Wedding
- One Bed for Christmas: A Baldwin Village Novella
- One Big Apple Christmas
- One Christmas Kiss in Notting Hill
- One Christmas Night
- One Christmas Wish
- One Christmas with the Earl
- One Click Love
- One Day in Cornwall
- One Day In Summer
- One Empire Night
- One Enchanted Christmas
- One Enchanted Winter
- One Family Christmas
- One Fateful Christmas Eve
- One Great Love
- One Holiday Ever After
- One Holiday Kiss - A Small Town Romance Short Story
- One Hot Christmas
- One Hot Holiday
- One Hundred Proposals
- One in a Billion
- One Jingle or Two
- One Last Letter from Greece
- One Last Time
- One Lonely Christmas Eve
- One Magic Kiss (A Timber Falls Valentine's Tale)
- One Moment
- One More Chance: A Second Chance Romance
- One More Christmas at the Castle
- One More Moment
- One More Time
- One More Turn: A Second Chance Romance
- One More Time
- One More Turn: A Second Chance Romance
- One More Yule Log
- One Night at Christmas
- One Night at Christmas: A Southern Belle Civil War Short Story
- One Night at the St. Nicholas
- One Night of Pleasure
- One Night Stand
- One Night Stand - Bad Boy Billionaire Romance
- One Night with a Duke
- One Night, One Unexpected Miracle
- One of a Kind Christmas
- One Perfect Christmas
- One Perfect Christmas and Other Stories
- One Perfect Summer
- One Silent Night
- One Snowy Night
- One Summer in Monte Carlo
- One Summer in Rome
- One Summer in Santorini
- One Summer Sunrise
- One to Remember
- One Waltz with the Earl
- One Week in Mazatlan
- One Week to Win Her Boss
- One Winter's Night
- Only for a Moment
- Only For Their Love
- Only in My Dreams
- Only Just Begun
- Only One Summer
- Only You
- Only You at Christmas
- Oops!
- Oops! Leprechaun
- Open for Business – Part 1
- Operación propósito de Año nuevo
- Operation Mistletoe Magic
- Operation Snowball - A Dickens Holiday Novella
- Operation Valentine
- Operation White Christmas
- Operation: Christmas Seduction
- Operation: Romeo