- Sin and Ink
- Sin Ataduras
- Sin censura
- Sin recetas para amar
- Since I Fell for You
- Sinful Pleasure
- Sinfully Scottish
- Sinfully Sweet: Tabitha and Leon
- Sinfully Wicked: Magic and Mayhem Universe
- Sinfully Yours
- Single
- Single & Ready
- Single Dad
- Single Daddies: A Doctor Romance Collection
- Single Daddy
- Single Daddy Billionaire
- Single Daddy Romance: A Billionaire Romance Collection
- Single Dads Club (The Complete Series)
- Single for the Summer
- Single in Buenos Aires
- Single Mom and the SEAL
- Single Witch's Survival Guide (15th Anniversary Edition)
- Single, White Cave Man
- Sinking in the Shadows
- Sinner's Delight
- Sins of a Ruthless Rogue
- Sins of a Wicked Princess
- Siren's Song
- Sirene contro corrente
- Siri, Who Am I?
- Sis, Level Up
- Sister Catherine
- Sisters in Bloom
- Sisters in Love
- Sisters in Sin
- Sisters in White
- Sit a Spell
- Six Steps to Happiness
- Size Matters
- Skandal Aizza, Istri yang Dipaksa Selingkuh
- Skandal Bulan Madu Nabella
- Skandal di Puncak Gunung
- Skandal di Vila Puncak
- Skandal Zandra, Istri Setia yang Selingkuh
- Skandal Zarina, Istri Pemalu
- Skeletons
- Skeptic in a Skirt
- Skid Marks and the Selby Slammers
- Skin Deep Melody
- Skinny Dipping Dare
- Skip to the End
- Skirt Chaser
- Skirting Danger
- Sky Trails
- Skydiving to Love
- Skye's the Limit
- Slam!
- Slamdunked by Love
- Slap Shot
- Slave School Dropout
- Slay Misty For Me
- Sleep in Heavenly Peace Inn
- Sleep in Heavenly Peace Inn Three
- Sleep in Heavenly Peace Inn Two
- Sleeping Beauty
- Sleeping with Ward Cleaver
- Sleigh Bride
- Slide
- Slight Chance
- Slim to None
- Slope of Love
- Slow and Steady Rush
- Slow Burn by Starlight
- Slow Burn Romance
- Slow Hand
- Small Holdings
- Small Town Charm
- Small Town Charmers: Boxed Set
- Small Town Romance Boxed Set: Books 1 - 5
- Smart And Sexy
- Smart Sass
- Smart Tass
- Smartypants Romance Fall 2019 Sampler
- Smartypants Romance Spring 2020 Sampler
- Smell Passion
- Smitten by the Brit
- Smitten with Croissants: A Sweet Romantic Comedy Set in France
- Smitten with Ravioli: A Sweet Romantic Comedy Set in Italy
- Smitten with Strudel: A Sweet Romantic Comedy Set in Germany
- Smoking Hot