Now Amazon just seems to be toying with the retail book stores of America. The online behemoth has long been hated by many bricks-and-mortar booksellers for the hugely discounted prices it charges on books and other items traditionally sold in book stores. And then there’s Amazon’s Kindle e-book reader which some stores blame for dropping sales. Now Amazon is getting into one business still dominated by college book stores: textbook rentals. [More]