What are they reading in Philadelphia?

The Daily Beast posted an interesting slideshow comparing the best-selling books of 2011 in the 10 largest cities in the nation.  Of course, there are several books that appear across the board (The Help, by Kathryn Stockett, and George R.R. Martin's Game of Thrones series come to mind), but there are some interesting regional differences.  Click here to take a look:  maybe you'll discover that you have literary brethren far afield.