I can't provide you with exact information about online bookstores because the prices of online bookstores fluctuate frequently and different readers have different needs and budget for books. However, you can use the search engine and online bookstore's search function to find the most suitable book price and purchase options for you. Some commonly used online bookstores included Amazon, Taobao, and Jingdong. You can try searching for novels that interest you on these platforms and compare the prices and book reviews of different sellers. In addition, you can also consider using e-book platforms such as Amazon, iBooks, etc. These platforms usually provide more favorable prices and rich e-book resources than traditional bookstores. No matter which method you choose to buy books, remember to read the reviews and ratings of the books carefully before you buy them, and pay attention to the payment method and return policy at the time of purchase to ensure that your shopping experience is pleasant and safe.