- Sir Emerald
- Sir Jasper
- Sir Onyx
- Sir Sapphire
- Sir's Rise
- Siren Beloved, Texas Sirens, Book 4
- Siren Enslaved, Texas Sirens, Book 3
- Siren from the Sea
- Siren in Bloom, Texas Sirens, Book 6
- Siren in the City, Texas Sirens, Book 2
- Siren in the Wind
- Siren in Waiting, Texas Sirens, Book 5
- Siren Reborn, Texas Sirens, Book 8
- Siren Unleashed, Texas Sirens, Book 7
- Siren's Call
- Sirens in Bliss, Nights in Bliss, Colorado, Book 10
- Sirius: Hidden Truth
- Sister Wife
- Sister-in-Law
- SISTERS: A Boxed Set
- Situación límite. Una novela sobre el poder del amor y la esperanza
- Situation
- Situation Critical
- Situation No Win
- Six Days
- Six Days of Memories
- Six Minutes to Midnight
- Six Months
- Six Sisters of Shame
- SIX, tome 1 : À nos destins mêlés
- SIX, tome 2 : À nos coeurs tourmentés
- SIX, tome 3 : À nos âmes liées
- Six-Gun
- Size 12 Is Not Fat
- Sizzle
- Sizzling Hot Heroes Collection
- Skeeter
- Skeleton's Key (Delta Crossroads Mystery Romance)
- Skid Row Serenade
- Skimming the Surface (Love & Hate #4)
- Skin
- Skin Deep
- Skin Deep
- Skin Deep Melody
- Skin Game
- Skinbound
- Skinwalker
- Skipdoll
- Skirt Chaser
- SKITTLES (The Trident Series Book 7)
- Skrupellos
- Skruvad
- Skull King : Le leader
- Skull King : Le roi
- Skull King : L’oppresseur
- Skull King: De heerser
- Skull King: De koning
- Skull King: De sloper
- Skull King: Der Herrscher
- Skull King: Der König
- Skull King: Der Unterdrücker
- Sky
- Sky Eyes
- Sky High
- Sky to Sea
- Sky's the Limit
- Skyggejegerne - Begynnelsen 3 - Den mekaniske prinsessen
- Slade Security Team Reihe
- Slade's Desire
- Slam
- Slammer
- Slash
- Slash (The Complete Series)
- Slash and Burn
- Slash and Dominate
- Slasher
- Slater's Enchanting Mate
- Slattery's Sin
- Slaughter Hill
- Slave Marked
- Slave to Beauty: The Complete Trilogy
- Slave to Love
- Slaves
- Slay
- Slay All Day
- Slay Bells
- Slay Bells Ring
- Slay Ride for a Lady
- Slayer
- Slaying Isidore's Dragons
- Slaying The Dragon
- Sledge
- Sleep No More
- Sleeper
- Sleepin' Alone
- Sleeping Angel
- Sleeping Beauty
- Sleeping Beauty: Book Four
- Sleeping Beauty: Book Three
- Sleeping Beauty: Book Two
- Sleeping With the Enemy
- Sleeps With The Fishes--Book 1, Sedona West Murder Mystery Series