abstract:The Ghost Map: The Story of London's Most Terrifying Epidemic – and How it Changed Science, Cities and the Modern World is a book by Steven Berlin Johnson in which he describes the most intense outbreak of cholera in Victorian London (See 1854 Broad Street cholera outbreak) and what it means to us today, from the way we understand cities, science, disease, and the modern world. The book incorporated the idea of gemeinschaft, dealing with the effects of an epidemic in a city of common values, language, and traditions.