The differences sometimes are as high as twenty percent. Each store offers different service and price. Some stores are very famous for variety of books they offer. Some stores offer high discounts. Some stores' shipping time is relatively shorter.
Some stores offer free read on line books.
If you already known where to go, click here . There are quite a few on-line book clubs. These clubs offer books with deep discounts in certentain fields. If you are interested in buying many books very often, you should consider to join one or more book clubs .