The two largest U.S. e-book reader manufacturers to take price cuts on the 21, in order to cope with the increasingly fierce market competition. A new round of price war is expected to promote e-book reader is further accepted by the mainstream consumer groups in the United states. The largest bookseller Barnes · Noble announced the same day, the 3G version of the Nook e-book reader retail price from $259 to $199. After a few hours online retail giant Amazon Co announced that the price of its own Kindle e-book reader from $259 to $189 from now on.