- Singing the Everfire - A Fantasy
- Singing Wind
- Singing with the Devil
- Single Dad Shifter
- Single Moms
- Single White Vampire
- Single Witch's Survival Guide
- Single Witch's Survival Guide (15th Anniversary Edition)
- Singular Focus
- Singular Irregularity - Time Travel Gone Terribly Wrong
- Singularities: Dorian Alexander
- Sinisen talon noita
- Sinister Paradise
- Sinister Spells
- Sinister Ties (Curse of the Demon Series, Book #1)
- Sink or Swim
- Sinking Hearts
- Sinking Stones in the Sky
- Sinner
- Sinners of Magic
- Sinners of Water & Fire
- Sinners on Sunset
- Sinnlicher Bann
- SINODIS
- Sins & Shadows
- Sins of Eden
- Sins of Empire
- Sins of Greed
- Sins of Legion
- Sins of Mercy
- Sins of Mine: A Paranormal Prison Romance
- Sins of Oz
- Sins of the Blood
- Sins of the Damned
- Sins of the Dark Zodiac
- Sins of The Father
- Sins Of The Father
- Sins of the Father: A Novel of the Lost Tribe
- Sins of The Heart
- Sins of the Mother
- Sins of the Night
- Sins of the Sirens
- Sins of the Son: A Tale of Bluebeard
- Sins of the Son: Book 10 of the Heku Series
- Sins of the Warrior
- Sins, Sacrifice, & Salvation
- Sintara et le Scarabée de Mechæom
- Sinthari - die gestohlenen Juwelen
- Siobhan
- Siobhan's Secret
- Siofra's Change: Book 3 The Broadus Supernatural Society Series
- Siofra's Fight: Book 4, The Broadus Supernatural Society Series
- Siofra's Nightmare: Book 2 The Broadus Supernatual Society Series
- Sion (Planet Abstrus Series #2)
- Sioreh
- Sioux Lookout: Confidential
- Sipplinger Sandale
- Sips of Blood
- Sir Arthur Conan Doyle's Collection [ 29 books ]
- Sir Coffin Graves
- Sir Coffin Graves Book 2
- Sir Gawain and the Green Knight
- Sir Gawain and the Green Knight AD499
- Sir Gawain and the Green Knight: A LitRPG Novella
- Sir Gawayne and the Green Knight
- Sir Genkaku Host Club (Book 3)
- Sir Genkaku Host Club (Book 4)
- Sir Gibbie
- Sir Harry: A Love Story
- Sir Henry
- Sir Ian Peters
- Sir Joseph Bazalgette's Spirit Bowl
- Sir Launcelot & His Companions (Unabridged)
- Sir Launcelot and His Companions
- Sir Launcelot & His Companions (Unabridged)
- Sir Launcelot and His Companions
- Sir Mortimer: A Novel
- Sir Ockham’s Journey
- Sir Owen: Champion of Murhaven
- Sir Thaydrin the High Elf
- Sir William Goes Fishing (Teabaggers Book 1)
- Sira e il ricordo di Goodland
- Siramas
- Sire of the Found System
- Siren
- Siren Bound
- Siren Call
- Siren Circle
- Siren Deep
- Siren of Secrets Box Set
- Siren Queen
- Siren Radio
- Siren Silence: The Fate of Cpt. Bacchus (A King of The Caves Novella)
- Siren Storms of Madness
- Siren Suicides
- Siren's Call
- Siren's Lure
- Siren's Score
- Siren's Song
- Sirena
- Sirena En Do Menor
- Sirene
- Sirene - E la Gemma della Luna Blu
- Sirenenbann und Seegesang
- Sirenens angreb
- Sirenor: Endure
- Sirens
- Sirens and Other Daemon Lovers
- Siren’s Song
- Sirgrus Blackmane Demihuman Gumshoe & The Dark-Elf