What are the classic Buddhist meditation books? Can you recommend something that can be bought in the market? Thank you.

The purpose of Buddhism is not meditation, too shallow, but it does have this effect. As for books, don't read them yet, and don't discuss them yet. They are profound and require a certain knowledge of ancient Chinese (memorizing classics is another matter, but it doesn't need to be comprehensive). It is recommended to read the works of contemporary Dade first. Here are some books worth recommending: The Experience of Zen written by the feast master. Life is a drama, written by Zongsa Jiangyang Qinzhe Rinpoche. Neither book is expensive. After reading them, you will definitely have a brand-new psychological experience, and there will be a surprise and confusion. Then, let me talk about practicing Buddhism personally.