The Ghost Map takes place in the summer of 1854. A devastating cholera outbreak seizes London just as it is emerging as a modern city: more than two million people packed into a 10-mile circumference, a hub of travel and commerce, teeming with people from all over the world, continually pushing the limits of infrastructure that's outdated as soon as it's updated. Dr. John Snow, whose ideas about contagion had been dismissed by the scientific community, is spurred to intense action when the people in his neighborhood begin dying. With enthralling suspense, Johnson chronicles Snow's day-by-day efforts as he risks his own life to prove how the epidemic is being spread.

From the dynamic thinker routinely compared to Malcolm Gladwell, E.O. Wilson, and James Gleick, The Ghost Map is a riveting story with a real-life historical hero. It brilliantly illuminates the intertwined histories of the spread of viruses, the rise of cities, and the nature of scientific inquiry. These are topics that have long obsessed Johnson, and The Ghost Map is a true triumph of the kind of multidisciplinary thinking for which he's become famous. This is a book that, like the work of Jared Diamond, presents both vivid history and a powerful and provocative explanation of what it means for the world we live in.