This dictionary investigates the linguistic and historical origins of over 1,700 place-names within Greater London to explain how the city's topography reflects its development. A. D. Mills, a noted scholar in the field of English place-names, utilizes rigorous etymological research to trace these names from pre-Celtic origins through the modern era. The text provides a systematic framework for understanding the evolution of London's streets, districts, and natural landmarks.

Experts and local historians recognize this work as a foundational reference text for the study of London topography. Readers frequently note the academic density of the prose, which serves as a reliable resource for researchers and curious residents alike.