Shadowhunters Codex is the essential guide to the shadow world of the Shadowhunters, drawn from the international bestselling series The Mortal Instruments and The Infernal Devices. Ideal for teens and longtime fans who want a reliable reference, this companion invites readers to brush up on demon languages, learn proper stele use, and discover exactly what a pyxis is. Presented as Clary’s own copy—with her sketches of friends and family in the margins and notes from Jace and Simon—the Codex offers a personal, inviting entry into the Shadowhunter universe.

Written as a true reference for budding Shadowhunters, Shadowhunters Codex presents clear, bite-sized entries that cover the core lore and practical knowledge readers seek. The experience is warm and approachable, blending illustrated pages, hand-drawn art, and margin-side thoughts to make learning feel like a shared adventure rather than a lesson. If you’ve ever wondered about demon languages, how runes work, or why the pyxis matters, this book explains it with accessible language and engaging visuals. For fans of The Mortal Instruments and The Infernal Devices, the Codex naturally ties familiar places and people into a hands-on guide you’ll flip through again and again.

• Core Shadowhunter lore: demon languages, stele use, runes, and the meaning of a pyxis
• Clary’s copy: personal sketches and margin notes from Jace and Simon
• Structured learning for young readers: clear entries, glossary-style explanations, practical tips
• Illustrations and layout: artful pages that invite exploration and quick reference

Shadowhunters Codex offers readers a reliable doorway into the wider Shadowhunter Chronicles, inviting them to explore with confidence and curiosity. After finishing, the reader gains a grounded understanding of the world, a sense of belonging to this magical community, and the motivation to dive into new adventures with greater insight and enthusiasm.