I don't know what your major is. Humanities students have at least a few books. You should continue to dabble in knowledge. In other words, you can have two books by Harle. On the one hand, this is related to your reading speed and work arrangement, on the other hand, it is related to the size of the department head. In addition, you don't have to force yourself to read a lot of books, just get into the good habit of studying in the library for an hour or two every day, or even take books with you half an hour before going to bed.