- Sense of Obligation
- Sensing Danger
- Sensing Danger 2: Capture
- Sensing Danger 3: Freedom
- Sentenza Capitale
- Sentient World
- Sentinel
- Sentinels of Tzurac: Terra Major Under Threat
- Sentry
- Sentry of the Sky
- Sentry Peak
- Sentry Squad
- Seph
- Sept jours dans le temps
- SeptStar
- Sequoian Escape
- Sera and the Dragon
- Serah of the Runners
- Seraphim Sky
- Sereine: Book One of the Hunter Trilogy
- Seren1ty
- Serpent of the Sun
- Serpent's Gift (StarBridge #4)
- Serpentine Fire
- Serpents' Teeth
- Sertian Princess
- Servants of the Legacy
- Set Ablaze
- Set de la Colonia
- Seth Carter’s Alien Adoption
- Setting The Board
- Settled on the Coast
- Seven Before the World
- Seven Day War
- Seven Days in May
- Seven Devils
- Seven Footprints To Satan
- Seven from the Stars
- Seven Lives
- The Dystopia Game: A Complete Novel
- The Dystopia Game: Episode One
- The Dystopia Game: Episode Two
- Seven Tales in Amber
- Seven Views of Olduvai Gorge
- Seven Winter Tales: Volume 1
- Seveneves
- Seventh Journey
- Several Things at Once
- Severed
- Severed Galaxy
- Sex, Drugs, and Starships
- Sex, The Stars & Princess Simla
- Sexbot
- Sexchanger: The Alien Gender-Switching Machine
- SF × 抽象画
- Sfidare Saber
- SFR
- Sguardo al Futuro
- Sha!Sha!Sha!
- Shadan
- Shade
- Shaded Noon
- Shades of Dark
- Shades Of Dark
- Shades of Darkness
- Shades of Freedom
- Shades of Treason
- Shades Within Us: Tales of Migrations and Fractured Borders
- Shadow
- Shadow & Claw
- Shadow & Light
- Shadow Attack on Old Edo
- Shadow Avengers
- Shadow Blade: LitRPG Adventure Fantasy
- Shadow Cast
- Shadow Creek: The Doors of the Ancients, Book 1
- Shadow Fall (Star Wars)
- Shadow Gambit: LitRPG Adventure Fantasy
- Shadow Game
- Shadow Hunting: LitRPG Adventure Fantasy
- Shadow Land
- Shadow Man
- Shadow of Atlantis
- Shadow of Empire
- Shadow of Eternity
- Shadow of Freedom
- Shadow of the Dominion
- Shadow of the Giant
- Shadow of the Hegemon
- Shadow of the Leviathan
- Shadow of the Machine
- Shadow of the Well of Souls
- Shadow of the Wraith
- Shadow of Utopia (Vol. 2 - The Resistance)
- Shadow of Utopia (Vol. 3 - The Invasion)
- Shadow of Victory
- Shadow Over Mars
- Shadow Planet: Mission 1
- Shadow Puppets
- Shadow Reflections
- Shadow Run
- Shadow Twins
- Shadow War
- Shadow Warrior
- Shadow Warrior Retribution
- Shadow Warrior Absolution
- Shadow Wars: Ascension of the Pirates
- Shadow Wars: LitRPG Adventure Fantasy