Cassandra Clare is the author of the #1 New York Times, USA Today, Wall Street Journal, and Publishers Weekly bestselling Shadowhunter Chronicles. She is also the co-author, with Holly Black, of the bestselling fantasy series Magisterium. The Shadowhunter Chronicles have been adapted as both a major motion picture and a television series. Her books have more than fifty million copies in print worldwide and have been translated into more than thirty-five languages. Cassandra lives in western Massachusetts with her husband and three fearsome cats.