- Shudder Inn
- Shudders!
- Shufflers
- Shutter
- Shutter Man
- Shy Ghosts Dancing: Dark Tales from Southeast Alaska
- Si les Morts-Vivants Attaquent...
- Si Muore Solo Due Volte
- Siamo legione
- Siamo tutti in ordine
- Sibs
- Sick
- Sick Cruising
- Sick Little Puppies
- Sick Summer Camp (Something Horrific)
- Sick Things: An Anthology of Extreme Creature Horror
- Sickle
- Sid
- Side Effects May Vary
- Sidembress
- Sides
- Sie
- Sie kamen aus dem All
- Sie sind da! Der Zombie als Motiv in Literatur und Film.
- Siebzehn
- Siege
- Siege of Stone: The Searchers, Book 3
- Siege of the Bone Children
- Sieh, was du getan hast
- Sielun pimeä puoli
- Siempre hemos vivido en el castillo
- Siempre Viva
- Sigil of the Spire
- Sigils of the Old God
- Signal Failure
- Signalz: An Adversary Cycle Novel
- Signed in Blood: Deals With the Devil Gone Bad
- Significance of the Missing White Dot
- Signor String
- Shadowhunters: Dark Artifices - 1. Signora della mezzanotte
- Sigo Yo...
- Sijaltainen
- Sikait
- Silas Morlock
- Silence
- Silence - A Tale of the Zombie Apocalypse
- Silence in Ramah
- Silence Is Concurrence
- Silence is Crimson
- Silence of the Wolves
- Silenced
- Silent Baby Screams
- Silent Dawn
- Silent Harbinger
- Silent Hill: Traición
- Silent Monsters: The Ascension Series
- Silent Night
- Silent Night of the Living Dead
- Silent Night, Final Night
- Silent Screams and Conspiracies
- Silent Sky
- Silent Whispers and Dark Shadows
- Silhouette
- Silhouettes
- Silicone Transformations
- Silk Widow
- Silkworms
- Silly Little Monsters
- Silo Générations
- Silver Blood
- Silver Bullets Don't Work
- Silver Hells
- Silver Moon
- Silver Nails
- Silverlight
- Silvertown
- Silverview
- Silverwood: The Door: A Novel
- Silvesterglocken
- Silvia
- Simeon
- Simia Dei
- Simon Knows Best
- Simple
- Simple ...
- Simple Rules and Other Stories
- Simple Simon
- Simply Twisted - Tenth Anniversary Edition
- Simple Simon
- Simply Twisted - Tenth Anniversary Edition
- Sin Eater
- Sin Full
- Sin to the Darkness
- Sin's Doorway
- Sin-eater.com
- Sincerely, Me
- Sinclair Academy - 01
- Sinclair Academy - 02
- Sinclair Academy - 03
- Sinclair Academy - 04
- Sinclair Academy - 05
- Sinclair Academy - 06
- Sinclair Academy - 07
- Sinclair Academy - 08
- Sinclair Academy - 09
- Sinclair Academy - 10
- Sinclair Academy - 11
- Sinclair Academy - 12
- Sinclair Academy - 13
- Sinder
- Sine Sole Sileo
- Sineater
- Sinfully Rich
- Sing A Mournful Melody: A Gothic short
- Sing To The Dead
- Singapore Horror Stories, Vol.1
- Singapore Horror Stories, Vol.2
- Singapore Horror Stories, Vol.3
- Singapore Horror Stories, Vol.4
- Singapore Horror Stories, Vol.5
- Singapore Horror Stories, Vol.6
- Singapore Horror Stories, Vol.7
- Singin' Them Down
- Single White Male: An Exercise in Lovecraftian Realisation
- Singularities
- Singularity
- Singularity and Other Stories
- Sinister
- Sinister Faces in the Dark
- Sinister Purposes
- Sinister Serpent