If you know anything about psychology, you can read Carnegie's book. If it is in the initial research of consumer psychology, we can recommend Philip Graves' Shopping Psychology: What do customers want? Or Michael Solomon's consumer behavior. Or look at advertising and consumer psychology, all the processes of promoting the market are completed by speculating on the target group.

Books only serve to refine ideas. Don't need to read too much. Actually, it's all the same. Just form a concept in mind. Social practice and application will make you deeply understand the essence between the lines.

I hope the answer will help you.