The folks over at the O’Reilly RADAR blog crunched some numbers and churned out some graphs. With the iPhone Apps store about to sell its one billionth app download,  the “books” category is by far and wide the largest mover and shaker. It saw 279% growth over the past week and while sporting only 11% of the Apps Store’s total offerings. Granted it’s not as popular as the Games and Entertainment categories and the growth probably has a lot to do with the Kindle App, but with all of the geo-synching-motion-controlling-gesture-detecting-music-blasting features that the iPhone can do… look what all those iPhone owners are wanting to explore on their gadgets… books.