There were many books that explained the Book of Changes. The following were some common ones: The Original Book of Changes: This is one of the oldest and most popular versions of the Book of Changes. It included the original text of the Book of Changes, annotations, and explanations of the hexagrams. 2. The Four Books of the Book of Changes: They are the annotations of the Great Learning, the Doctrine of the Meanings, the Analects of Confucius, and the Mencius. They explain Confucian ideas with the philosophy of the Book of Changes. " General Theory of the Book of Changes ": This is a comprehensive book of the Book of Changes, including the original text of the Book of Changes, annotations, philosophical implications, historical background, and practical applications. 4 << The Book of Changes >>: This is a book that specializes in the application of the Book of Changes. It guides people on how to use the wisdom of the Book of Changes in their daily lives through the hexagrams, line statements, and philosophical ideas of the Book of Changes. Book of Changes: This is a book that explains the Book of Changes in modern Chinese. The author explains the philosophical thoughts, cultural implications, and practical applications of the Book of Changes in a simple and profound way. These are some books on the interpretation of the Book of Changes. They can help you better understand the philosophy and application of the Book of Changes.