Justine Larbalestier is the author of award-winning books for Young Adults, including Liar, Razorhurst, and most recently My Sister Rosa, a psychological thriller set in New York City. There, Che has just turned seventeen. All he wants is to box, get a girlfriend, and return home to Australia. Between Che and happiness, however, is his little sister Rosa, who he is almost certain is a psychopath. She hasn't hurt anyone – yet. But it seems only a matter of time.

Justine joined Amy to talk about psychopathy among other things. My Sister Rosa is out through Allen & Unwin.