- Silvia-Gold 99
- Simmer Down, Red
- Simmering Consequences
- Simmering Illusions
- Simon Says... Hide
- Simon Says... Jump
- Simon Says... Ride
- Simon Says... Run
- Simon Says... Scream
- Simons Bliss
- Simple Evidence
- Simple Faith
- Simple Machines
- Simple Ride
- Simplicity Lane
- Simply Irresistible
- Simply Scandalous
- Simply Wicked
- Sin
- Sin & Silence
- Sin & Suffer
- Sin And Bone
- Sin and Cinnamon
- Sin and Ecstasy (Club Xandra 5)
- Sin and Ink
- Sin and Sacrifice
- Sin and Tonic
- Sin and Tonic (Français)
- Sin City Alibi
- Sin culpa
- Sin Doll
- Sin for Me
- Sin memoria
- Sin of Omission
- Sin of Silence
- Sin on the Strip
- Sin renunciar a nada
- Sin Vuelta Atrás
- Sin With Cuffs
- Sin With Me
- Sin's Bastards Christmas
- Sin's Bastards MC Next Generation Boxed Set #1
- Sin's Bastards Mother's Day
- Sin's Iniquity
- Since All Is Passing
- Since I Saw You
- Since the First Day
- Since Yesterday: An Alpha Billionaire Romance
- Sincerely, The Boss
- Sinclair
- Sinclair Academy - 01
- Sinclair Justice
- Sinderella Sexy
- Sinergy
- Sinful
- Sinful Deeds
- Sinful Empire
- Sinful Encounter: Alpha Billionaire Romance
- Sinful Illusions
- Sinful Intent
- Sinful Intentions
- Sinful Nights
- Sinful Pleasures
- Sinful Prince
- Sinful Princess
- Sinful Protector
- Sinful Purity (Sinful Series Book 1)
- Sinful Relations
- Sinful Royalty
- Sinful Sacrament
- Sinful Sacrifices
- Sinful Secrets
- Sinful Seduction
- Sinful Truth
- Sinful Vows
- Sinfully Yours
- Sing Me to Sleep
- Singapore Trap
- Singe
- Singed (Titanium Security Series, #2)
- Singing a Song
- Single Daddies: A Doctor Romance Collection
- Single Daddy Billionaire
- Single Daddy Romance: A Billionaire Romance Collection
- Single Mama's Got More Drama
- Single with Children
- Single with Kids
- Single With Twins
- Sinister Intent (Pirates Cove 3)
- Sinister Intentions & Confiscated Conception
- Sinister Skies
- Sinister Threat
- Sinister Weddings
- Sink or Swim
- Sinned
- Sinned (The Complete Series)
- Sinned Again
- Sinned Tonight
- Sinner and Saint
- Sinner and Scars
- Sinner Saint Box Set
- Sinner Takes All
- Sinner's Gin
- Sinner's Gin (Français)
- Sinner's Pet (Book 1)
- Sinner's Pet (Book 2)
- Sinner's Pet (Book 3)
- Sinner's Steel
- Sinners are Winners
- Sinners of Water & Fire
- Sinnliche Klänge: Eine Rockstar Ménage
- Sins and Needles
- Sins and Saints (Taking Flight Book Two)
- Sins Of David
- Sins of Her Father
- Sins of Her Past (Lost Coast Harbor, Book 5)
- Sins of Innocence
- Sins Of Our Imagination
- Sins of the Mind
- Sins of the Past