What books do beginners read about Zhouyi and Eight Characters?

If you are a beginner of eight characters, you'd better recite the trunk so that you can recite it without thinking. Then you have to know the trunk thoroughly and memorize it so that you can use it without thinking in the future. Then read some common books with examples first, and then it is better to read Tianmu. Shao Weizhong's book is also worth reading.