If you want to sell old books, you can refer to the following steps: 1 Post information on the website of an online bookstore or a secondhand bookstore. These sites are often called "second-hand book exchange sites" or "second-hand bookstores." These sites can be found through search engines. The information on the website included the title, author, publication date, price of the book, and when they wanted the book to be sold. 2. Use social media platforms. For example, social media platforms such as Facebook, Instagram, and Twitter also allowed the publication of second-hand books. You can create accounts on these platforms and post photos and information about books. 3. Sell books at your local bookstore or library. These institutions usually deal with old books. You can find guides on how to sell old books at these institutions. Bring the book to a local auction or exhibition venue. For example, second-hand markets or old book exchange gatherings. Whichever method you choose, make sure you evaluate the books before you sell them, make sure they meet your requirements, and consider donating them to people who need them.