Cassandra Clare wrote the Sunday Times and New York Times bestselling novel Sword Catcher, the first book in The Chronicles of Castellane. She's also author of the No. 1 New York Times, USA Today, Wall Street Journal and Publishers Weekly bestselling Shadowhunter Chronicles. Clare also co-authored the bestselling fantasy series Magisterium with Holly Black. The Shadowhunter Chronicles have been adapted as both a major motion picture and a television series. Cassandra Clare's books have more than fifty million copies in print worldwide and have been translated into more than thirty-five languages. She lives in western Massachusetts with her husband and three fearsome cats.