Cassandra Clare lives in Massachusetts, USA, with her husband. She is the author of the international number-one bestselling series The Mortal Instruments and its prequel sequence The Infernal Devices. Sarah Rees Brennan is an Irish YA fantasy author. Her bestselling trilogy The Demon's Lexicon has done especially well in the UK. Her latest book, Team Human, was co-authored with Justine Larbalestier. Maureen Johnson is the author of eight contemporary YA novels, including the Suite Scarlett and 13 Little Blue Envelopes series. She has also collaborated with fellow popular YA writers John Green and Lauren Myracle. She lives in New York City.