Amazon.com is selling more electronic books than printed books, less than four years after it started selling e-books.
Since April 1, Amazon.com Inc. has sold 105 e-books for every 100 printed books, including printed books hardcover and paperback, for which there is no electronic edition.
The comparison also excludes free e-books.
Amazon also said the latest and cheapest version of its Kindle e-book reader is the bestseller of the line, five weeks after it was introduced. It costs $114, and shows ads in standby mode.
