The shadowhunter's codex - Cassandra Clare

Since the thirteenth century, the Shadowhunters' Codex has been theone 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. This is Clary's copy, and as an artist herself, she's sketched pictures of her friends and family throughout the book, and scrawled helpful advice in the margins. Of course, she couldn't exactly stop Jace or Simon from adding their thoughts either.