It should come as no surprise but, at least according to Amazon, South Dakota reads red. Not red as in my younger days (you know, them Commies). No, red as in the red state-blue state divide.
Amazon has an Election 2008 map tracking political book buying. According to it, during the last 60 days a “red” book, The Obama Nation: Leftist Politics and the Cult of Personality, is besting the best-selling “blue” book, U.S. Versus Them: How a Half-Century of Conservatism Has Undermined America’s Security, 69 percent to 31 percent. Indicating this is neither unexpected nor an aberration, during the same period of the 2004 election the “red book” (Shadow War: The Untold Story of How Bush is Winning the War on Terror was outselling the “blue book” (Homegrown Democrat: A Few Plain Thoughts from the Heart of America) 62 percent to 38 percent.
Amazon does have a page explaining how it comes up with the map, which it intends to update daily.
People who like this sort of thing will find this the sort of thing they like.
Abraham Lincoln, quoted in Collections and Recollections