Manga in Theory and Practice is a guidebook written by Hirohiko Araki, the creator of the popular manga series JoJo's Bizarre Adventure. In this book, Araki shares his insights and techniques for creating compelling manga. He covers various aspects of manga creation, including character design, storytelling, and panel layout. Araki's unique perspective and storytelling style make this book a valuable resource for aspiring manga artists and fans of JoJo's Bizarre Adventure.