Delve into the details of all things Shadowhunter with this illustrated guide to the knowledge and lore of the Shadowhunter world.

Since the thirteenth century, the Shadowhunter’s Codex has been the one and only manual for Shadowhunters looking to brush up on their demon languages, learn proper stele use, and discover just what exactly a pyxis is. Featured in both The Mortal Instruments and The Infernal Devices, this guide is a necessity for any young Nephilim on their journey to becoming a Shadowhunter. Beautifully illustrated, the Codex contains images of the famous Shadowhunter homeland of Idris, as well as depictions of demons and other Downworlders.

But this isn’t just any copy of The Shadowhunter’s Codex. It’s Clary’s copy, and as an artist herself, she’s sketched pictures of her friends and family in the book, and scrawled helpful advice in the margins. Of course, she couldn’t exactly stop Jace or Simon from adding their thoughts either. Part encyclopedia, part history, part training manual—complete with commentary from Shadowhunters who have seen it all—this beautiful guide is a perfect supplement to the #1 New York Times bestselling series.

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.

Joshua Lewis lives in western Massachusetts with his wife, Cassandra Clare; three cats; and several thousand books. When not exhaustively researching arcane bits of the Shadowhunter universe, he can be found playing music, writing his own fiction, and keeping the weight of several thousand books from collapsing the house.