The "Illuminae Files" is a young adult science fiction series written by Amie Kaufman and Jay Kristoff. It consists of three main books: "Illuminae," "Gemina," and "Obsidio." The series is set in a futuristic universe and follows the story of characters navigating a war between powerful corporations and alien threats, all presented through a unique format of mixed media, including emails, chat logs, and surveillance transcripts. The narrative centers around the characters Kady Grant and Ezra Mason, who face challenges in their fight for survival. The series explores themes of love, betrayal, and the impact of technology on society, making it a compelling read for fans of speculative fiction.