books.google.com - Even in the flattest landscape there are passes where the road first climbs to a peak and then descends into a new valley. Most of these passes are simply topography with little or no difference in climate, language, or culture between the valleys on either side. But some passes are different: they are...http://books.google.com/books/about/The_New_Realities.html?id=WmAsWS9-fFsC&utm_source=gb-gplus-shareThe New Realities
