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 coauthor of the bestselling fantasy series Magisterium with Holly Black. 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. Visit her at CassandraClare.com. Learn more about the world of the Shadowhunters at Shadowhunters.com.

Robin Wasserman is the author of Girls on Fire, an NPR and BuzzFeed Best Book of the Year. She is a graduate of Harvard College with a Master’s in the history of science. She lives in Los Angeles, where she writes for television.