Books can be sold at many locations both online and in person. You can email some stores a list of books that you would like to sell. They’ll then be able to give you an idea if they would be interested in purchasing your books. If one store isn’t interested, contact others. It really varies from store to store which books they’re interested in purchasing based on both current inventory and book genres the bookstore sells. The books need to be in good condition.
Bookstores that buy books for cash:
Bookstores that buy used books for store credit: