The Book of Three Circles is a vintage role-playing book published in 2001 by a group of authors including Brooks, Cogman, Grove, Snead, Wendt, and Wulf. Focused on the genre of sorcery, this book offers a unique and immersive experience for players and game masters alike. With some highlighting, it adds a personal touch to the engaging story and captivating world-building presented in its pages, making it a valuable addition to any role-playing collection.