For a person who knows nothing about the "Book of Changes", the best book to study the "Book of Changes" is

The background of human development in the "Book of Changes", the purpose of pursuing good fortune and avoiding disaster. It tells people the mistakes made by their predecessors.

The history of the "Book of Changes" tells people about the past and development. Laws tell people about the future. Understanding the [Book of Changes] can help you know the true meaning of the past and the future.

If you like reading novels, read the series "Ghost Blowing the Lamp" to tell the story of tomb robbing, which involves many Yin-Yang, Five Elements, Feng Shui things to increase your interest in getting started

Fantasy novels like "Yang Shen"

If you are disgusted with basic theories, read Liu Dajun's "Introduction to the Book of Changes" for the basics of Zhouyi. For divination, read Liu Dajun's "Basics of Najia"

For medical advice, read Liu Lihong's "Introduction to Zhouyi" "Thinking about Medicine"

For Feng Shui, read Li Juming's "The First Book on Learning Feng Shui"

Focus on the application of Yili in life and directly read "The Great Learning" and "Yong"

There are ancient texts It would be better to read some basic ancient Chinese texts

The threshold for basic ancient Chinese writing is too high for ordinary people

You can also buy Master Nan Huaijin’s Miscellaneous Commentary on the Book of Changes and The Series of Book of Changes, which explain the profound things in simple terms and make them clear and easy to understand. Many issues in Yi Xue are explained in a popular way. Fudan University has published ten volumes of Nan Huaijin’s anthology. Purchase the third volume.