First, I think Chen Yuan's Introduction to Four Pillars Foresight and Introduction to Zhouyi Foresight are the most popular and easy to understand. After getting started, we should pay attention to Didi Tianmu, Ziping Zhenquan, poor children's treasure, and authentic divination. Yi Yin and other ancient books. Lay a solid foundation of yin and yang and five elements.
Second, the situation: In modern times, Yang Zeng's The Geographer's Mind is available for reading, but the classics of Guo Pu and Yang Gong are still the main ones: The Book of Burying, the Book of Doubting Dragons and the Book of Rocking Dragons are required reading.