The Book of Changes was one of the classics of ancient Chinese philosophy. There were many versions of books about it, and there might be some differences between the different versions. However, if you want to buy a good book of the Book of Changes, you can consider the following factors: 1. Authority and reliability: You can consult some authoritative materials such as ancient Chinese literature, historical records, academic research, etc. to understand the basic content and related concepts of the Book of Changes. 2. In-depth explanation: A good Book of Changes should allow the reader to understand the basic principles and core ideas of the Book of Changes and be able to analyze the relevant concepts and phenomena in depth. 3. Whether it has practical application value: In addition to understanding the cultural and spiritual implications of the Book of Changes, you should also consider whether it has practical application value, such as divination, philosophical thinking, career planning and other fields. If you want to choose a good book on the Book of Changes, you can consider buying an authoritative book with in-depth explanations and practical application value. However, due to the wide variety of books on the market, he needed to choose carefully.