A review by setnets
The Ghost Map: The Story of London's Most Terrifying Epidemic—and How It Changed Science, Cities, and the Modern World by Steven Johnson

4.0

This is a very engaging history of the 1854 cholera epidemic and the work of Dr John Snow and Rev. Henry Whitehead to prove it was caused by fecal contamination leaking from a cesspool into the Broad Street pump. However, while Johnson's emphasis on Snow's map showing the geographic distribution of deaths during the outbreak over a Voronoi diagram to show street level proximity to the pump, and criticises other histories and textbooks for omitting the 'critical' Voronoi diagram, the version of the map reproduced in the book also lacks the Voronoi diagram. It's an unfortunate oversight on the part of the book's designers.