Cassandra Clare is the author of City of Bones, the first book in The Mortal Instruments trilogy and a New York Times bestseller. Her The Infernal Devices series has spawned three #1 bestsellers. With Holly Black she is the author of the Magisterium series, a New York Times bestseller. Born overseas, Cassandra spent her early years traveling around the world with her family and several trunks of books. She lives in Massachusetts.