Book 1
I Am Number Four: The Lost Files: Six's Legacy
Pittacus Lore
Book 2
I Am Number Four: The Lost Files: Nine's Legacy
Pittacus Lore
Book 3
I Am Number Four: The Lost Files: The Fallen Legacies
Pittacus Lore
Book 4
I Am Number Four: The Lost Files: The Search for Sam
Pittacus Lore
Book 5
I Am Number Four: The Lost Files: The Last Days of Lorien
Pittacus Lore
Book 6
I Am Number Four: The Lost Files: The Forgotten Ones
Pittacus Lore
Book 7
I Am Number Four: The Lost Files: Five's Legacy
Pittacus Lore
Book 8
I Am Number Four: The Lost Files: Return to Paradise
Pittacus Lore
Book 9
I Am Number Four: The Lost Files: Five's Betrayal
Pittacus Lore
Book 10
I Am Number Four: The Lost Files: The Fugitive
Pittacus Lore