Books 1 & 2 are paperback, book 3 is hardcover “Illuminae: The Illuminae Files" is a science fiction novel by Amie Kaufman and Jay Kristoff that follows teenage hackers Kady Grant and Ezra Mason as they escape their planet from a corporate attack, and their struggle to survive in a desperate situation. The story is told through a unique format of emails, transcripts, reports, and interviews, making it a captivating read. “. Google