"Jeopardy!" champion Ken Jennings charts “the wide, weird world of geography” in his latest book Maphead. NPR investigates his process in a “Fresh Air” interview. Scribner Books provides a small sample as well. While discussing the particulars of America’s “Road Geeks,” Jennings makes it clear to this listener that he’d probably be interested in Cynthia Enloe and Joni Seager’s The Real State of America Atlas, which was reviewed by our own Bill Morris last July.