Ok kindle matchbook is awesome. If you have bought a book from Amazon there is a decent chance that you can buy the kindle version of the book on the cheap. I know this is pretty much par for the course for people who buy records and some CDs (you buy the physical and you get the mp3 download). It is about time that the same is true for physical books. I prefer a physical book but I love being able to carry some of these books with me on my nexus 7.