Cassandra Clare is the author of the internationally bestselling Mortal Instruments series and Infernal Devices trilogy. Her books have more than 20 million copies in print worldwide and have been translated into more than 35 languages. The Dark Artifices continues the story of the Shadowhunters. Cassandra lives in Massachusetts, USA. Visit her online at CassandraClare.com. Learn more about the world of the Shadowhunters at UKShadowhunters.com.
New York Times bestseller Sarah Rees Brennan is the author of the critically acclaimed Unspoken, a romantic Gothic mystery. The first book of her Demon's Lexicon series received three starred reviews and was an ALA Top Ten Best Book for Young Adults. She lives in Ireland. Visit her at SarahReesBrennan.com. New York Times bestseller Maureen Johnson is the author of 10 YA novels, including 13 Little Blue Envelopes, The Name of the Star and The Madness Underneath. Maureen was named one of Time magazine's top 140 people to follow on Twitter. Visit her at MaureenJohnsonBooks.com or follow her on Twitter (@maureenjohnson).