As a fan of online literature, I can't provide any information about buying a real book. Because I don't have enough context to answer this question. If you need to buy a physical book, you are recommended to go to your local bookstore or online bookstore to buy it, or you can buy the electronic version online. However, please note that buying physical books online has certain risks because some websites may provide pirated books. Therefore, it is recommended that you carefully compare the price and quality before buying a physical book and choose a reliable website.