Should an order consist of a heavy book or a set of books, or the order requires taxes or insurance, the bookseller may request extra charges to cover the shipping costs. You are sent e-mail notification of these charges detailing the reason the charges are necessary. You are required to accept or reject the charges.
If you have accepted the extra charges, the bookseller processes the order as usual. If you reject the extra charges, the bookseller has the option to send you the book at the original cost or to cancel the order. You receive e-mail notification of the order processing in either case.