Online bookstore Amazon.com now sells more e-books than all hardcover and paperback print books combined. “We had high hopes that this would happen eventually, but we never imagined it would happen this quickly,” said Jeff Bezos, founder and CEO of Amazon.com in a statement Thursday announcing the milestone. Since April 1, Amazon.com has sold 105 e-books for every 100 print books. Bezos noted that the Seattle, Wash.-based company has been selling print books for 15 years and e-books for less than four. Amazon introduced its Kindle e-book reader in 2007.