Pretty good. An interesting report on the big Cholera epidemic of 1854, including the misadventures that surrounded the decoding of its causes (and the big win – discrediting the “miasma” theory of its spread). Johnson writes as engagingly as ever, and does a nice job of discussing the some continued advantages and dangers of living in megacities. For some reason, though, the book didn’t grab me like Everything Bad is Good For You. It felt a little unfocused, like he was wondering around a bit with out a map. Oh, and the endnotes with only backreferences instead of forward references from the text seems like a really weird practice. Still, entertaining and enlightening and worth reading.