Book excerpt: An Improved Must-Have Reference for Everything Qi Men Joey Yap's Qi Men Dun Jia Compendium is the most comprehensive reference book to the Qi Men Dun Jia in the Chinese Metaphysics world. This book contains all the detailed references to the components, methodologies and attributes pertaining to the Qi Men Dun Jia system. Joey Yap has extracted, transliterated and tabulated the essential information from the ancient classics of Qi Men Dun Jia and presented them in simple English. Designed for the purpose of facilitating studies and further research, this book aims to bridge the gap for students and further research, this book aims to bridge the gap for students who want to learn, and the teachers who want to teach Qi Men Dun Jia. It is also designed to enable the genuine enthusiasts who want to dig deeper into the knowledge, but don't have the time to do extensive research and prefer to find all the sources of information in ONE single volume.