Apple is now preventing shoppers at the German iBookstore from using discount iTunes cards to buy books, according to a local report. The ban is said to be a result of pressure from a German bookseller's association, which sent a cease-and-desist letter to Apple last week. German law mandates that a book be offered at the same price throughout the country, something an iTunes discount in theory circumvents, if likely unintentionally. A national supermarket chain, REWE, is informing customers that iTunes cards can't be used to shop at the iBookstore.
