There are indeed many textbooks for civil service examinations on the market. My suggestion is to go to the bookstore and read it directly. Open each book to see which one is better written and understand which one I suggest to buy. As for whether to enroll in classes, my suggestion is to read books and do exercises first. In this process, you will find your own weak links, and it will be more effective and easier to understand the teacher's explanation if you study in class with pertinence. In recent years, interview topics tend to solve small problems. Examining candidates' ability to solve problems is more prominent, and the test of their ability is more prominent. It will be more beneficial for you to prepare for the exam according to the nature of the work of the reported unit.