- Instant of Decision
- Instinct
- Insufficient
- Insurgency
- Insurgent
- Insurgent (prequel 2 of Hunted)
- Insurmountable Odds
- Insurrecição
- INSURRECTIO
- Insurrection
- Intact: Cyborg Two
- Integer Blue
- Integral
- Integrity
- Intempor'Elles
- Interchange
- Interdictor
- Interdictum
- Interfaccia Estrema
- Interference
- Intergalactic Agent Bride
- Intergalactic Bogtrotter
- Intergalactic Love : Alien Abduction Romance
- Intergalactic Mate : Sci-Fi Alien Romance Collection
- Intergalactic Sweet Shop
- Intergalactica
- Intergaláctica (La Trilogía Completa)
- Interim
- Interlibrary Loan
- Interlink
- Interlude of Pain (Zaran Journals, Book 3)
- Internet Brides
- Internet Warrior
- Interrogation: An Agent of The Emperor Science Fiction Short Story
- Interrupting Starlight
- Intersection: Joe Ballen, Book Four
- Interspace Origins Box Set
- INTERSTELLAR A Series of Science Fiction Adventure Stories Omnibus Parts 7: 12
- Interstellar Brides® Program Boxed Set
- Interstellar Cargo Omnibus: ICARUS, DAEDALUS, and LAZARUS
- Interstellar Dad
- Interstellar Dad: Mass Reproduction
- Interstellar Monitor: the Forsaken Multitude
- Interstellar Patrol
- Interstellar Space Flight Is Not So Difficult: Expanded New Edition
- Interstellar starpilot
- Interstellar Warfare
- Interstellare Bräute Programm Sammelband
- Interstellare Bräute® Programm Sammelband
- Intertwined Fate
- Intervenção
- Intimate Domain
- Intimate Enemy
- Into Stillness: A Short Story
- Into Summer
- Into the Badlands
- Into The Black
- Into the City: Stormbringers
- Into The Crucible
- Into the Dark
- Into the Dust Storm
- Into the Empty Dark
- Into the End
- Into the Forest Shadows
- Into the Fourth Universe
- Into the Heart of Varste
- Into the Hinterlands
- Into the Horsebutt Nebula
- Into the Lair of Le-Roosh
- Into the Light
- Into the Looking Glass
- Into the Magic
- Into the Night
- Into the North: A Keltin Moore Adventure
- Into the Out
- Into the Queen's Domain
- Into the Silence
- Into the Silent World
- Into the Storm
- Into The Tall Grass
- Into the Unknowable
- Into the Violet Gardens
- Into The Void
- Into the Void
- Into the Wasteland: A Zombie Novel
- Into the Wild
- Into the Wormhole
- Into Winter
- Intorno alla Luna
- Intoxicated
- Introduction to the Alien Races Book
- Introspection: Transformation
- Inundación
- Invaded
- Invaders From Planet XXX - The Screenplay
- Invaders from the Infinite
- Invaders from the Infinite
- Invaders from the Infinite (Serapis Classics)
- Invaders of the Rokujouma!? Volume 26
- Invaders of the Rokujouma!? Volume 27
- Invaders of the Rokujouma!? Volume 28
- Invaders of the Rokujouma!? Volume 30
- Invaders of the Rokujouma!? Volume 35
- Invaders of the Rokujouma!? Volume 36
- Invaders of the Rokujouma!? Volume 37
- Invaders of the Rokujouma!? Volume 38
- INVADING FORCES
- Invasie uit de kosmos: 3 sciencefiction-avonturen
- Invasion (The Walking Dead, Tome 6)
- Invasion Alienigena - Dentro Del Área 51
- Invasion Book One