I Am Number Four: The Lost Files: The Fallen Legacies, is an E-book that was released on July 24, 2012 along with the book The Lost Files: The Legacies. It follows the story of a Mogadorian teenager named Adamus Sutekh, his relation with the Garde and how that brought a great change over his life. It features information regarding Number One, Number Two and Number Three - their lives and explanations for their deaths.