- Sean Yeager Hunters Hunted
- Search & Recovery: A Retrieval Artist Novel
- Search for Rotaton
- Search For the Alien God - The Combined Trilogy
- Search Terms: Alpha
- Search the Sky (Sci-Fi Classic)
- Searching Arcania
- Searching for the Fleet: A Diving Novel
- Seas of Ernathe
- Seas of Venus
- Seas of Venus, Second Edition
- Season of Predators
- Season of the Serpent: Book Two
- Seasons of Plenty
- Seattle Quake 9.2
- Sebak - Gott der Pharaonen
- Sebak II. - Krieger der Sphinxe
- Sebak III - Erlöser von Atlantis
- Sebastians Generationenschiff
- Second Chance
- Second Chance Rescue
- Second Chances
- Second Childhood
- Second Coming
- Second Contact
- Second Contact (Colonization, Book One)
- Second contact war
- Second Fiddle
- Second Fire: Sequel to First Dawn of the Lost Millenium Trilogy
- Second Fire: Sequel to First Dawn of the Lost Millennium Trilogy
- Second from the Sun
- Second Heart
- Second Horizon
- Second Invasion
- Second Nature
- Second Pass
- Second Planet
- Second Sight
- Second Stage Lensmen
- Second Stringers: The Sole Advantage of Power
- Second Stringers: The Sole Advantage of Power
- Second Wind: Stranger Than Fiction, Book 4
- Seconda giustificazione: la macchina
- Secret Frontier
- Secret Heart
- Secret Liaison
- Secret of Life
- Secret of the Mine: A Minecraft Adventure Book
- Secret of the Red Spot
- Secret of the Scribe
- Secret of the Stars
- Secret of the Vettigs
- Secret Panorama
- Secret Passage
- Secret Prince's Bride
- Secret Realms
- Secret Supers
- Secretos perdidos en Allasneda
- Secrets Brought to Light
- Secrets in the Prayers
- Secrets in Time
- Secrets of Alexandria
- Secrets of Lost Island
- Secrets of Ravenstone
- Secrets on Wenshen
- Secrets à l'ombre du manguier
- Section 31: Disavowed
- SECTOR 10
- Sector Bravo
- Sector Guard Bundle 1
- Sector Guard Bundle 2
- Sectors
- Secured Mail
- Securing Aisling
- Security Act 2070
- Security Agent's Alien Bartender
- Security Risk
- Sedition Rising
- Sedotta dal Cyborg
- Seducción Ciborg
- Seduced by an Alien Shifter
- Seduced by the Gladiators: A Science Fiction Reverse Harem Romance
- Seducing Her Vikings
- Seducing the Saint
- Seduction of the Phoenix
- See Ya, Space Cowboy
- Seed & Bone
- Seed of Aldebaran
- Seed of Babylon
- Seed of Light
- Seed of Power: Book Two of the Dark Pilgrim Series
- Seeder Saga
- Seeding Hope Among the Ashes
- Seedlings
- The SEEDS Trilogy
- Seeds of Change
- Seeds of Conviction
- Seeds of Earth
- Seeds of Gaia
- Seeing
- Seeing Forever
- Seeing Red
- Seeing Things
- Seeing Through Sampson's Eyes
- Seeker and the Pathways of the Gods
- SEEKER and the SPIRIT SHIFTERS
- Seekers of the Dogazoids
- Seekers: All That's Left
- Seekers: Long Shot
- Seekers: Point of Divergence
- SeekerStar
- Seeking . . .
- Seeking Sirius, SciFi Suspense with a Metaphysics Twist
- Seeking Solitude
- Seeking Time
- Seelenräuber
- Seen And Not Seen
- Seer