Every time I buy a book and go back to the dormitory, I'm afraid of being passed around by my roommates and classmates. Because it's dirty and no wonder others, I dare not buy a book to see what I should do. It seems that you are a book lover, little girl, right? Books are for reading. Didn't the ancients have the three wonders of Bian Wei? It's not necessarily dirty or bad for your roommate to borrow your book. Even if it's dirty and torn, it's no big deal. I suggest you buy books as well. If you don't lend it to your classmates for fear of getting dirty, it will delay your friendship, and if you don't buy books, it will delay your study.