For all you American political junkies out there: Amazon.com has used its book sales data to create a nifty election-year map of the U.S., where they show which states are buying more “red” books, and which are buying more “blue” books. (If you squint real hard, you can detect a few smatterings of blue on the map.)
It’s not clear at first how Amazon determined what constitutes a “red” book and a “blue” book, but if you click on the “learn more” link, the methodology is broken down for you.