There are many ways to buy cheap books: 1. Online bookstores: Some online bookstores will provide discounts and offers such as Amazon, Taobao, Jingdong and other e-commerce platforms. Search for the books you need on these platforms and pay attention to whether there are discounts and offers. Second-hand bookstores: Some second-hand bookstores sell cheaper second-hand books. You can search for these stores on second-hand bookstore websites such as Taobao, Craigslist, Facebook Marketplace, etc. 3. Library: Many cities have public libraries. You can go to the library to borrow books and enjoy certain discounts. Some universities and colleges also provide library services where you can borrow books. Book Exchange: You can join some book exchange communities to reduce the cost of buying books. In the community, you can find people who have the same needs as you and exchange the books you need. Print it yourself: If you have your own printing press, you can print some books and sell them to readers. This method required a certain printing cost but could bring higher profits. Buying cheap books requires some planning and patience, but by looking for ways to find cheaper books, you can enjoy reading more.