- In the Sargasso Sea: A Novel
- In the Service of the Queen
- In the Shade of the Slowboat Man
- In the Shadow of Giants
- In the Shadow of Her Heart
- In the Shadow of Light
- In the Shadow of Lightning
- In the Shadow of Men
- In The Shadow of Monsters
- In the Shadow of Monstrous Things
- In the Shadow of Riverside (Tremontaine Season 2 Episode 11)
- In The Shadow Of The Beast
- In the Shadow of the Black Sun: The Complete Trilogy
- In the Shadow of the Dark Planet
- In the Shadow of the Demon Gate
- In the Shadow of the Kings (Fabled Quest Chronicles, Book 2)
- In the Shadow of the Nasilene
- In the Shadow of The Old World
- In the Shadow of the Watch
- In The Shadows Of Blackwood
- In the Shadows of the Trees
- In the Sight of Akresa
- In the Spider's Web
- In the Stacks: Author's Enhanced Edition
- In the Still of the Knight
- In the Still of the Night
- In The Temple Of Erotia
- In the Tenth House
- In The Time After
- In the Time of Kings
- In the Time of the Americans
- In the Time You're Given
- In The Town Where All Things Are Possible
- In the Twilight Between
- In the Twinkling of a Bronze Eye
- In the Upper Room and Other Likely Stories
- In the Uttermost Parts of the Sea
- In the Valley of the Statues: And Other Stories
- In the Vanishers’ Palace
- In the Very Beginning
- In the Very Beginning
- In the Village Where Brightwine Flows
- In the Vine Country
- In The Wake of a Crimson Moon
- In the Walls of Eryx (Fantasy and Horror Classics)
- In the Walls of Uryx
- In the Walls: A Horror Story
- In the Waste Places
- In the Werewolf's Den: The Return of Magic Plague
- In the Woodlot
- In the Works
- In the World of Hyboria
- In the Year of Their Lord
- In Their Pleasant Palaces
- In This Life and the Next
- In This World…
- In Thrall of Destiny
- In To & Out Of (A Collection of Short Stories)
- In Too Deep
- In Touch With Nature: Tales and Sketches from the Life
- In Trust: The Story of a Lady and Her Lover
- In una Parola
- In Vino Veritas
- In volo tra i Mondi
- In Winter
- In Wish World
- In World City
- In Your Eyes
- In-Between
- In-expressibility
- Inanimates: Tales of Everyday Fear
- Inanna's Anger
- Inappropriate Colours, 12 Story-Delights for the Whacky Mind
- Inattendu
- INBETWEEDOM
- Inborn Magic
- Inca Pachacutec
- Incandescent
- Incantations
- Incantesimo
- Incarnate Rain
- Incarnation
- Incarnation: Wandering Stars Volume One
- Incarnations
- Incendeia-me
- Incendiary
- Incendiary Magic
- Inception of a Brigade
- Inception of Gold
- Inception: Origin of Mythandria
- Incessant
- Inchiostro Ardente
- Incident at Walter's Creek
- Incident In A Tomb
- Incidents in Idaho
- Incognita (Bookburners Season 2 Episode 6)
- Incoming! An Angry Robot 2019 Sampler
- Incompetence
- Incompletos
- Incongruous Echoes
- Incontri Virtuali - vizi e virtù nascosti dietro il monitor di un computer
- Incontro coi Lemuriani
- Incontro con Lucifero
- Incorrigible: Secrets Past & Present - Part Four / Becoming (Staves of Warrant)
- Incorrigible: Secrets Past & Present - Part One / Entrapments (Staves of Warrant)
- Incorrigible: Secrets Past & Present - Part Three / Gathering (Staves of Warrant)
- Incorrigible: Secrets Past & Present - Part Two / Seeking (Staves of Warrant)
- Incredibilmente blu
- Incredible Adventures Along the Seven Wonders
- Incredible Adventures Along the Seven Wonders (Part one)
- Incredible Adventures Along the Seven Wonders (part three)
- Incredible Adventures Along the Seven Wonders (Part two)
- Incrocio con Nibiru - Le avventure di Azakis e Petri
- Incubi e Immagini. Racconti impossibili
- Incubus
- Incubus Again Paranormal Adult Romance
- Incubus Dreams
- Incubus Honeymoon