America Transformed: Mapping the 19th Century, edited by Ronald E. Grim and Allison K. Lange.: Boston: Norman B. Leventhal Map and Education Center at the Boston Public Library, 2019. This catalogue is a wonderful reference piece for cartographers, historical geographers, historians of cartography, map collectors, map dealers and libraries. Leading the way in this kind of American map education has been the Norman B. Leventhal Map and Education Center at the Boston Public Library, which has produced five outstanding map exhibitions, each accompanied by an exhibition catalogue. [Extracted from the article]