If you are not studying prediction, then just read Nan Huaijin’s book.
If you are learning to predict, there are more: (my personal recommendation)
Recommended books on the Four Pillars:
Qu Wei's "Four Pillars of Detailed Truth"
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Qu Wei "Four Pillars Multiple Images"
Qu Wei "Four Pillars Advanced Class Lecture Notes"
Li Shunxiang "Four Pillars Mysteries"
Li Shunxiang "Four Pillars" Training classes for beginners, intermediate and advanced"
The ancient books "Zi Ping Zhen Chuan" and "Drip of Heaven"
You can refer to:
Li Hongcheng's books
Shao Weizhong's "Analysis of Examples of Four Pillars of Numerology"
The ancient book "Yuanhai Ziping"
Liu Yao:
Qu Wei's "Liu Yao Detailed Truth"
p>Qu Wei's "Six Yao Multiple Images"
Qu Wei's "Six Yao Advanced Class Lecture Notes"
Li Shunxiang's "Six Yao Mysteries"
Li Shunxiang's "Basic, Intermediate and Advanced Six Yao Training Courses"
Ancient books: "Qingtong Baojian" and "The Authentic Divination"
"Lecture Notes on Specific Judgment of Six Yao" Li Hongcheng
Feng Shui:
Note: Feng Shui is roughly divided into two schools, one is the Li Qi school and the other is the Formal school
The representative work of the Li Qi school is "Shen's Xuankong Xue" (Part 1, 2). Next
Yang's Feng Shui
Formalist "Golden Lock and Jade Pass"
Reference: "Passing the Road Yin and Yang"
Liu Bowen's "The Complete Book of Geography"