Facebook just bought Push Pop which is a tablet and smart phone e-book producer which pushes the boundaries of what an e-book is. One of the reasons I have been a huge proponent of students using e-books is because of the amazingly quick changes that are occurring all the time. We really are to the point where people need to rethink what a "book" really is. Please take a minute to watch the short Ted Talks video above to see some of the potential of books. Of course the question here is why did Facebook buy this company?!