Hidden EnemyBook - 2014
Collects three novellas that fill in missing parts of the Lorien story, including Five's early years on Earth and Mark James' trials after the Mog attack on Ohio.
Publisher: New York : Harper, an imprint of HarperCollinsPublishers, 
Edition: First edition
Characteristics: 403 pages ; 21 cm
Alternative Title: I am number four, the lost files. Hidden enemy