- I am a Harvester of Light
- I Am Number Four
- I Am Number Four: The Lost Files: Five's Betrayal
- I Am Number Four: The Lost Files: Five's Legacy
- I Am Number Four: The Lost Files: Hidden Enemy
- I Am Number Four: The Lost Files: Nine's Legacy
- I Am Number Four: The Lost Files: Return to Paradise
- I Am Number Four: The Lost Files: Six's Legacy
- I Am Number Four: The Lost Files: The Fallen Legacies
- I Am Number Four: The Lost Files: The Forgotten Ones
- I Am Number Four: The Lost Files: The Fugitive
- I Am Number Four: The Lost Files: The Guard
- I Am Number Four: The Lost Files: The Last Days of Lorien
- I Am Number Four: The Lost Files: The Legacies
- I Am Number Four: The Lost Files: The Navigator
- I Am Number Four: The Lost Files: The Search for Sam
- I Am the Chosen One
- I Am Traitor
- I Became the Secretary of a Hero! (light novel)
- I Became the Secretary of a Hero, Volume 3
- I casi impossibili di Zoe&Lu. Un'amica da salvare
- I custodi - Lo scrigno e la libellula
- I Did Not Give That Spider Superhuman Intelligence!
- I doni delle streghe
- I due castelli. N.E.O. - Libro due
- I fratelli Cuordileone
- I Guardiani di Nettuno, L'Ardore
- I guerrieri della sposa del sole
- I legami delle tenebre
- I Live in the Magical States of America
- I maghi degli elementi
- I Maghi Raminghi - I sette bracciali
- I Piombi Neri
- I Poemi di Ossian
- I racconti delle fate
- I Racconti Delle Stelle
- I ragazzi dell'Altro Mare
- I Shall Wear Midnight
- I Sigilli dell'Altior 3
- I Signori degli Elementi
- I Think I Murdered Miss
- I tre regni
- I tre volti dell'umanità - La danza del tempo
- I Walk Alone
- I'd Rather be a Vampire Than a Zombie
- I'm Not Who You Think I Am
- I, Houdini
- I, Vampire
- IA: B.O.S.S.
- IA: Initiate
- IA: Invincible Assassin
- IA: The Origin Novels
- Ibrahim
- Ibrido
- Icari
- Ice
- Ice and Fyre
- Ice and Sky
- Ice Blessed
- Ice Cold (Replica #10)
- Ice Crown
- Ice Fairies
- Ice Kissed
- Ice Like Fire
- Ice secret
- Icebreaker
- Icefall
- Icefire
- Iceland Tales 1: Wächterin der geheimen Quelle
- Iceland Tales 2: Retterin des verborgenen Volkes
- Iceland Tales: Alle Bände der sagenhaften »Iceland Tales« in einer E-Box
- Ich bin Nummer Vier
- Ich, Bakoo
- Identical Strangers
- IDENTITY
- Idris and the Scroll of Destiny
- If I Should Die
- If I Speak True
- If I Wake
- If I Were You
- If the Magic Fits
- If We Were Giants
- If Wishes Were Princes
- If You Give a Cat the Boot
- Iffy Magic: Confessions of a Faux Fairy Godmother
- Ifrait
- Iffy Magic: Confessions of a Faux Fairy Godmother
- Ifrait
- Iggie, "Small Sorcerer"
- Ignite
- Ignite the Sun
- Ignite the Sun Educator's Guide
- Ignition
- IJs als vuur
- IJshart
- IJskoud verraad
- IJzerhart
- Ikenga
- Ikoner
- Ikot (Unang libro sa Talaarawan ng Bampira)
- Ikrar Kemenangan (Buku #5 dalam Cincin Bertuah)
- Ilddragen Ferno
- Ilden vågner
- Illaberek
- Illuminae
- Illuminated Hearts 2: Nachtträger
- Illuminated Hearts 3: Verräterschatten
- Illusion
- Illusion and Indemnity
- Illusion of Power
- Illusionarium
- Illusionary
- Illusions
- Illusions of Fate
- Illusory Love
- Illyria
- Im Bann des Dschingis-Khan
- Im Banne des Mächtigen
- Im Blut ein Schwarzbär
- Im Herzen ein Schneeleopard
- Im Jenseits schmeckt die Liebe süßer
- Im Labyrinth von Zeit und Traum
- Im Schatten des Blutmondes
- Im Schatten des Drachen
- Im Schatten des Fuchses
- Im Schatten des Schwertes
- Im Schatten des Sonnenkönigs – Die Gabe
- Im Tal der Giganten: Operation Nautilus - Vierter Roman