buy more e-books for its Kindle device than all print books — hardcover and paperback — combined. Given that people seem to spend more and more of their time peering at glowing electronic screens, this was probably bound to happen. Still, the swiftness of this sea change — three-and-a-half years after the Kindle hit the market — appeared to catch even Amazon by surprise. 'Customers are now choosing Kindle books more often than print books. We had high hopes that this would happen eventually, but we never imagined it would happen this quickly — we've been selling print books for 15 years and Kindle books for less than four years,' said Jeff Bezos, Amazon's CEO, in a statement."