- Series: I Am Number Four: The Lost Files Series Record # 31788
- Sub-series of: Lorien Legacies Universe
- Webpages: Wikipedia-EN
- Series Tags: young-adult sf (20)
- 2 I Am Number Four: The Lost Files
- 1 Six's Legacy (2011) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 2 Nine's Legacy (2012) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 3 The Fallen Legacies (2012) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 4 The Search for Sam (2012) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 5 The Last Days of Lorien (2013) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 6 The Forgotten Ones (2013) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 7 Five's Legacy (2014) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 8 Return to Paradise (2014) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 9 Five's Betrayal (2014) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 10 The Fugitive (2014) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 11 The Navigator (2015) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 12 The Guard (2015) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 13 Legacies Reborn (2015) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 14 Last Defense (2016) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- 15 Hunt for the Garde (2016) [SF] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- I Am Number Four: The Lost Files: The Legacies (2012) [C] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- I Am Number Four: The Lost Files: Secret Histories (2013) [C] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- I Am Number Four: The Lost Files: Hidden Enemy (2014) [C] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- I Am Number Four: The Lost Files: Rebel Allies (2015) [C] by James Frey and Jobie Hughes [only as by Pittacus Lore]
- I Am Number Four: The Lost Files: Zero Hour (2016) [C] by James Frey and Jobie Hughes [only as by Pittacus Lore]