Published late last month, Mark Monmonier’s new book, Patents and Cartographic Inventions: A New Perspective for Map History (Palgrave Macmillan) is on a somewhat more arcane and non-obvious subject than his usual fare. It’s an exploration of the U.S. patent system that focuses on map- and navigation-related inventions. The publisher’s description: “In probing evolving notions of novelty, non-obviousness, and cumulative innovation, Mark Monmonier examines rural address guides, folding schemes, world map projections, diverse improvements of the terrestrial globe, mechanical route-following machines that anticipated the GPS navigator, and the early electrical you-are-here mall map, which opened the way for digital cartography and provided fodder for patent trolls, who treat the patent largely as a license to litigate.” Actually sounds interesting as hell; the book is quite expensive, though. Amazon, iBooks.