The Ghost Map - A Street, an Epidemic and the Hidden Power of Urban Networks by

The Ghost Map - A Street, an Epidemic and the Hidden Power of Urban Networks by Steven Johnson. Published by Penguin Books in 2008. Paperback. 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.