
What if the most terrifying person you know is your ten-year-old sister? Seventeen-year-old Aussie Che Taylor loves his younger sister, Rosa. But he's also certain that she's a psychopath—clinically, threateningly, dangerously. Recently Rosa has been making trouble, hurting things. Che is the only one who knows; he's the only one his sister trusts. Rosa is smart, talented, pretty, and very good at hiding what she is and the manipulation she's capable of. Their parents, whose business takes the family from place to place, brush off the warning signs as Rosa's -acting out.- Now that they have moved again—from Bangkok to New York City—their new hometown provides far too many opportunities for Rosa to play her increasingly complex and disturbing games. Che's always been Rosa's rock, protecting her from the world. Now, the world might need protection from her.
Author

Justine Larbalestier is an Australian young-adult fiction author. She is best known for the Magic or Madness trilogy: Magic or Madness, Magic Lessons and the newly released Magic's Child. She also wrote one adult non-fiction book, the Hugo-nominated The Battle of the Sexes in Science Fiction (Best Related Book, 2003), and edited another, Daughters of Earth: Feminist Science Fiction in the Twentieth Century. Her surname has been pronounced in several different ways, but the FAQ on her website says that Lar-bal-est-ee-air is correct: Q: How do you pronounce your surname? A: Lar-bal-est-ee-air. It can also be pronounced Lar-bal-est-ee-ay or Lar-bal-est-ee-er. Those are all fine by me. Friends at school used to pronounce it: Lavaworm. I have to really like you to let you get away with that one, but. Larbalestier was born and raised in Sydney, Australia. She now alternates living between Sydney and New York City. In 2001, Justine married fellow author Scott Westerfeld.