There were many factors to consider when opening a bookstore, including cost, profit, market positioning, and so on. If you want to sell books in the fantasy genre, I suggest you consider purchasing them from some well-known online bookstores or wholesale markets. These online bookstores would usually provide a relatively favorable price and could purchase a large number of guaranteed quality books. For example, you could search for the "online bookstore rankings" or "wholesale market" to learn about the local online bookstore and wholesale market and choose the appropriate channel according to your needs. At the same time, you also need to know which brands and publishing houses are available for these types of books so that you can choose the right purchase channel. In addition, you also need to conduct market research to understand the local purchasing power and reader needs in order to develop a reasonable sales strategy. You can use market analysis tools such as Google Insight to analyze the behavior and preferences of readers in order to better target the market and develop marketing strategies. In short, you need to consider the cost, profit, market positioning and other factors to sell the book. I suggest you choose the right purchase channel to conduct market research and formulate a reasonable sales strategy in order to successfully open a bookstore.