I didn't like Ken Jennings or his previous book about hyper-competitive trivia people, but he's dialed it down and this one is really charming, not to mention that in the fragment of map visible on the cover, Emmett Idaho is clearly visible. I love maps, and tell students that my mother had a map of Europe painted on the kitchen floor so my father would quit drawing on tablecloths. These are fellow map geeks--the contestants at the National Geographic geography bee, Michael Palin and the Royal Geographic Society, very intense geocachers, surveying and trigonometry, OpenMapSource and rescuers in the Haiti earthquake, Google Earth, the map curator at the Library of Congress, the WWII cartographer who drew C.S. Lewis' maps of Narnia AND the Normandy beaches, map thieves, by-mail Road Rallies, the Traveler's Century Club, road geeks and signage, the voices in GPS units (Re-Calculating!) and deceptive Mercator projections.