Tells the story of the terrifying cholera epidemic that engulfed London in 1854, and the two unlikely heroes - anesthetist Doctor John Snow and affable clergyman Reverend Henry Whitehead - who defeated the disease through a combination of local knowledge, scientific research and map-making.

Steven Johnson is the author of the acclaimed books Everything Bad is Good for You (described as a 'must read' by Mark Thompson, head of the BBC), Mind Wide Open, Emergence and Interface Culture. His writing appeared in the Guardian, the New Yorker, Nation and Harper's, as well as the op-ed pages of The New York Times and the Wall Street Journal. He is a Distinguished Writer In Residence at NYU's School Of Journalism, and a Contributing Editor to Wired. He is also the co-creator of several influential web sites: FEED, Plastic, and Outside.in. He has degrees in Semiotics and English Literature from Brown and Columbia Universities. He lives in Brooklyn with his wife and three sons.

Steven Johnson hosts a web log at

www.stevenberlinjohnson.com