- Inside the World of Die for Me
- Insidious
- Insight: Web of Hearts and Souls #1 (Insight series 1)
- INSOMNIO
- Instinct - L'intégrale
- Instinct - Tome 1
- Instinct - Tome 2
- Instinct - Tome 3
- Instructions In Flesh
- Integration
- Intensity
- Intentional Haunting
- Intercrossed
- Internautas: os chips reinventando o nosso dia a dia
- Intertwined
- Interview with the Vixen (Archie Horror, Book 2)
- Into the Dark
- Into the Forest of Strom
- Into the Great Wonderful
- Into the Pit: An AFK Book (Five Nights at Freddy’s: Fazbear Frights #1)
- Into the Shadows
- Into the Wilderness
- Intocable
- Invasion of the Road Weenies
- Inverted Pricolici
- Invisibilité
- Invisible
- Invisible Terror Collection
- Is She for Real?
- Isandro
- Isla de Lobos: Corriendo con la Manada
- Isla's Inheritance
- Isla's Oath
- Islam Folklore The Man Who Committed 99 Murders
- Island of Fog
- Isle
- Isle Of Midnight: Darkness Rising (Isle Of Midnight Series, Book 3)
- Isle Of Midnight: Hearts Of Glass (Isle Of Midnight Series, Book 2)
- Isle Of Midnight: Darkness Rising (Isle Of Midnight Series, Book 3)
- Isle Of Midnight: Hearts Of Glass (Isle Of Midnight Series, Book 2)
- Isle Of Midnight: Last of the Lost Souls (Isle Of Midnight Series, Book 4)
- Isle Of Midnight: Vicious Delights (Isle Of Midnight Series, Book1)
- Isle of Souls
- Isle of Truth
- It Creeped At Midnight
- It Happened on Thunder Road
- It Spells Z-O-M-B-I-E!
- It Will End Like This
- It's Alive! It's Alive! (Goosebumps SlappyWorld #7)
- It's All Downhill from Here
- It's In The Blood (Book 1)
- It's In The Blood (Book 2)
- It's In The Blood (Book 3)
- It's In The Blood (Book 4)
- It's In The Blood (Book 5)
- It's Silent In These Halls