- Space Ranger: Mars
- Space Rangers
- Space Rats
- Space Rats and Rebels (The Complete Serialized Novel)
- Space Rats and Rebels: Fools Rush In (Episode 1 of a 3 Part Serial)
- Space Rats and Rebels: Last Chance (Episode 3 of a 3 Part Serial)
- Space Rats and Rebels: Princess Problems (Episode 2 of a 3 Part Serial)
- Space Rats on Monster Planet
- Space Recall: Star Warriors
- Space Refugees: Star Warriors
- Space Rogues Omnibus One (Books 1-3)
- Space Rogues Omnibus Two (Books 4-6)
- Space Shooter Octopus
- Space Station 1 (Serapis Classics)
- Space Station Acheron
- Space Station Down
- Space Tales
- Space Train
- Space Tramp
- Space Trippers Book 4: Will Work For Parts
- Space Trippers Book 5: Don't Even Ask
- Space Tripping with the Shredded Orphans
- Space Troopers - Collector's Pack
- Space Troopers - Folge 3
- Space Troopers - Folge 4
- Space Troopers - Folge 5
- Space Troopers Next - Folge 1: Neu Terra
- Space Troopers Next - Folge 2: Kalter Entzug
- Space Troopers Next - Folge 4: Der Hüter
- Space Troopers Next - Folge 5: Boarding
- Space Troopers Next - Sammelband: Folgen 1-5
- Space Tug
- Space Unicorn Blues
- SPACE VIKING: Terro-Human Future History
- Space Vulture
- Space War Blues
- Space Warrior AD 60,400.111102
- Space Warrior AD: BOOK IV
- Space: 1975
- Spaceberg
- Spaceboy Mars: Star Warriors
- Spacecarrier
- Spacefarer: Fanatic's Bane
- Spacehart
- Spaceheim
- Spacehounds of I P C
- Spacehounds of IPC
- Spaceland
- Spaceling
- Spaceman No.3, Sent by God
- Spaceman of Bohemia
- SpaceMan: A Post-Apocalyptic Thriller (The SpaceMan Chronicles Book 1)
- Spaceport Atlantis
- Spacer (Star Minds Lone Wolves)
- Spaceship Down
- Spaceship in the Woods
- Spacesteader One
- Spade
- Spare Parts
- Spark of Life
- Sparks of Rebellion (Side Quest #6)
- Sparrow & Tulip
- Sparrow Song
- Sparrowhawk Legacy
- Spartan Planet
- Spartan X
- Sparx and Arrows
- Spatial Militia
- Spawn
- Spawn of Darkness
- Spawn of Jupiter
- Spawn of Laban
- Spawn of the Comet
- Spawn of The Comet
- Spawn of the Stars
- Spazio prima frontiera
- Spazio Profondo
- SPB: Super Powered Being
- Speak
- Speak No Evil
- Speaker for the Dead
- Speaker of the Shakk
- Speaking of Dinosaurs
- Spear's Journey
- Spec The Halls: Volume 1
- Special Delivery: Answering The Call
- Special Delivery: EMT Service for the Super Powered
- Special Patrol Service
- Specials
- Species 5319: First Contact
- Species 5319: Salvation
- Specimen 959
- Specimens
- Specter of the Past: Star Wars (The Hand of Thrawn)
- Specter of the White Death (Salmon Run - Book 5)
- Specters in the Storm
- Spectras Arise Trilogy: Omnibus Edition
- Spectre of El Dorado
- Speculative Science Fiction Classics
- Spell of the Magi
- Spellslinger
- Spelunkers
- Sperm Donor for a Cosmic Paradox
- Spezialist
- Sphere
- Sphärenklänge
- Spider Song
- Spider-Man 2
- Spiderworld
- Spidy, Recluse's Revenge
- Spike
- Spillthrough
- Spin Control
- Spin State
- Spina Comes Home
- Spindles
- Spinnen-Fäden
- Spinnen-Krieger
- Spinnen-Netze
- Spinneret
- Spinspace
- Spinward Assassin
- Spinward Fringe Broadcast 10.5: Carnie's Tale
- Spinward Fringe Broadcast 13: Warriors
- Spinward Fringe Broadcast 14: Rebel
- Spinward Fringe Broadcast 15: Pursuit
- Spinward Fringe Broadcast 8: Renegades
- Spirali di ghiaccio
- Spirit Fox
- Spirit Lance
- Spirit of Fire
- Spirit of Orn
- Spirits of Shadowfire
- Spirits of the Coastals
- Spirits of the Jungle
- Spiritual Interviews with the Guardian Spirit of George Lucas and the Spirit of Carrie Fisher
- Spiritual Storms
- Spit City Hustle