The Ghost Map by Steven Johnson | Online Resources.

“It is the summer of 1854. Cholera has seized London with unprecedented intensity. A metropolis of more than 2 million people, London is just emerging as a one of the first modern cities in the world. But lacking the infrastructure necessary to support its dense population – garbage removal, clean water, sewers – the city has become the perfect breeding ground for a terrifying disease no one knows how to cure.”