Let's use the notes of the number one scholar in mathematics. I've used it before and it's not bad. There are more explanations. . If you just want to read classical Chinese, you can buy a tool version of the Complete Works of Chinese, which is better to explain in all aspects. . As for English, don't buy these two. I bought it, but it didn't work. In fact, buying English means reading grammar. You can buy grammar explanations or cloze reading links to do it. . Doing more is useful, listening and reading more. If your grades are not too bad, you'd better not rely on English tutoring books.