Illuminae, by Amie Kaufman and Jay Kristoff, is the first book of a young adult series titled The Illuminae Files. The story is set in the year 2575 and most of it takes place in space. The two main characters are Kady Grant and Ezra Mason. Kady, a seventeen-year-old girl with dyed pink hair, who is also a secret hacker, is aboard the spaceship Hypatia.