Like your Kindle? and all those e-books you're reading on it? What about reselling the e-book once you've read it? The company that amazed the world with its transformation from a bookseller to a technology leader has some other plans for the e-books it sells so cheaply. It intends to create an exclusive second-hand market for used e-books, according to a patent that it has recently been awarded. Nicholas Carr weighs in with his thoughts on the idea that pushes the envelope on the idea of "goods".