Six's Legacy is the first of The Lost Files novellas, about Number Six's capture, imprisonment, and escape. It was published as an eBook on July 26, 2011. In July 24, 2012, it was released in The Lost Files: The Legacies Collection.
Number Six—when John meets her in I Am Number Four she’s strong, powerful, and ready to fight. But who is she? Where has she been living? How has she been training? When did she develop her legacies? And how does she know so much about the Mogadorians?
In I Am Number Four: The Lost Files: Six’s Legacy, discover the story behind Six. Before Paradise, Ohio, before John Smith, Six was traveling through West Texas with her cêpan, Katarina. What happened there would change Six forever.
The Mogadorians invaded and destroyed Lorien. Nine Garde Children and their Mentor Cêpans escaped, and fled to Earth. Number Six and her Keeper, Katarina, have been on the run, training and preparing to fight back.
The story is narrated by Number Six and of them going about their lives on Earth. She speaks of living in Denver and indulging in normal human childhood experiences, such as going to the YMCA and wearing barrettes in her hair. However, because she and Katarina remembered different backstories, they had to move because Six's friend Eliza grew suspicious.
The two Loric moved to Puerto Blanco next, hiding in plain sight as "the only whites for many miles."