This book chronicles the evolution of London over the past century, as reflected in the changing cartography of A-Z maps. Philip Parker, a historian specializing in urban development, utilizes a century's worth of A-Z maps as his primary source to illustrate the physical and functional transformations of the city. The book argues that these maps serve as a unique lens through which to understand London's development, from the rise of iconic structures to the shifts in its infrastructure and entertainment venues.

The book is presented as an accessible exploration of London's history through the tangible medium of its maps. The author's approach suggests a focus on visual evidence and factual recounting of urban change. The framing implies that the book will appeal to those interested in London's past, cartography, and the evolution of urban landscapes, offering a unique perspective on familiar landmarks and forgotten histories.