- Ackroyd, Peter. London Under. New York: Anchor Books, 2011. ISBN 978-0-307-47378-3.
- Unlike New York, London grew from a swamp and its structure was moulded by the rivers that fed it. Over millennia, history has accreted in layer after layer as generations built atop the works of their ancestors. Descending into the caverns, buried rivers, sewers, subways, and infrastructure reveals the deep history, architecture and engineering, and legends of a great city.
