Chris Stevens’s book Appillionaires chronicles the explosive growth of Apple’s App Store and dives into the background behind popular, successful apps like Angry Birds and Doodle Jump. The book doesn’t cover the Android app landscape at all, nor does it cover any of the other application stores (e.g. Microsoft’s Windows Marketplace or the Mac App Store). And since it focuses on popular apps, it only primarily covers indie game developers who have struck it rich, not on applications like productivity office suites or medical apps. However, it’s a great glimpse into this cutthroat industry.