Underlining the speed of change in the publishing industry, Amazon said that two years after introducing the Kindle, customers are now buying more ebooks than all hardcovers and paperbacks combined. According to unaudited figures released by the company on Monday, since the start of 2012, for every 100 hardback and paperback book sold on its site, customers downloaded 114 ebooks. Amazon said the figures included sales of printed books which did not have Kindle editions, but excluded free ebooks.
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