Yuan Haiziping: The eight-character classic works after Li's Eight Characters, with a slightly messy narrative, are the first works with a complete eight-character main theoretical system. This book is concise and practical, and it is very incisive in discussing the ten gods such as financial officials and grain printing. This is insurmountable in later learning. Poetry, rhyme and prose are the essence. If you are familiar with it, you can find the book of numerology and touch the nuances.
Sansheng Communication: The whole book 12 volume, with a huge system. However, it's also a bit messy. But it is magnificent and contains many secrets of the eight-character sages. Its ten gods' names, meanings, rhymes, tones, patterns, poetic styles and prose all have unique vision. Because the author Wan Min was originally a scholar, compiling this book has its own advantages. Later, due to the excellent selection of materials, the system was magnificent. If you haven't carefully read the three courses of life, it is a waste of students' level. This book is an intermediate to advanced reading of numerology. It seems that you can understand something. In fact, there are still many places that have not attracted enough attention from scholars who study life, so I regard her as an advanced reading. Intermediate level people can also read more books and lay a solid foundation.
Sandy: Ren Tieqiao and Xu are the most famous works. The book skips the supernatural and evil spirits, and discusses Zi Ping with the gains and losses of Yin and Yang and Five Elements. Many techniques are exquisite and have always been written by numerology researchers. Just because it is traditional and pure, it has its own unique views, and some views cannot be fully accepted. I believe my friends can understand this. However, after all, it does not lose its position in the numerology classics. I don't hide my thoughts in my spare time.
Poor expert's suggestion: this book aims to discuss the gains and losses of immortals with ten days' work and December. Simplicity is its advantage. However, this is not simple. Without years of experience, it is not easy to understand this book. Although the method suggested by poor experts has its shortcomings of rigid frame, it is superb. You can pay attention to this book, but you can't see the level of the eight-character pattern. The quality seems simple, but it is actually excellent. I know very few people. Therefore,
This book is an advanced reading of numerology.
Eight-character classic numerology books recommended:
Yuanhaiziping
Di Dian Mu
Makoto Ziping
Explore the origin of numerology
Sheng tong Ming hui
Shenfeng Tongkao
The poor-Tong Baojian
Natural element bond
Zi Cui ping Yan
The significance of Didi Tianjing
As for the book you said, since you personally think there are many repetitions, it is not suitable for you to keep it and reread it. I advise you not to buy it. I believe that if you visit bookstores more, you can absorb the essence. There are so many books recommended above, you can choose a few to read and benefit a lot.