There are many online bookstores that you can refer to: Amazon: One of the world's largest online bookstores offers a wide range of books, including novels, history, science, literature, etc. 2. Taobao: One of the largest online shopping platforms in China also has many online bookstores that offer a variety of books at affordable prices. 3.com: One of China's largest integrated e-commerce platforms provides a variety of books, including novels, history, science, literature, etc. Dangdang: One of the largest e-commerce companies in China offers a variety of books, e-books, and other digital products. These are some of the more popular online bookstores, and there are many other online bookstores to choose from. When choosing an online bookstore, it is recommended to carefully compare the prices, services, and reviews of different bookstores to choose the most suitable online bookstore.