Thank you for viewing my products. To save on shipping costs, items that can be posted will be shipped via Yu-Packet Post or Yu-Packet Post Mini, so please understand. Generally, if there are 6 or fewer books, they will be shipped via Yu-Packet Post, which is a postal service. These are used books purchased from a used bookstore. They show signs of use and may have stains. Please purchase with the understanding that they are used books.