MacNN | Amazon selling more Kindle books than all paper combined

MacNN | Amazon selling more Kindle books than all paper combined:

Amazon marked a historic event for itself on Thursday after revealing that Kindle e-books were now outselling all forms of print combined. The switch came just four months after digital overtook paperback and less than a year after they began outselling hardcovers. Since the start of April, Amazon has been moving 105 paid Kindle books for every 100 paper title and would be higher if it included public domain books.