This book is a biography of the professional life of Harry Beck as inventor and developer of the London Underground diagram as we now know it. The book is very well illustrated, with many full page colour maps from the entire 30 year period Beck worked on the diagram, as well as some earlier and later examples -- which themselves prove just how brilliant a desgner Beck was. It includes two previously unpublished Beck diagrams and an appendix section which features a selection of Beck's working sketches and variations, including a proposal for the Paris Metro diagram.
The book itself was specially designed so that it's shape could best display the poster-diagrams as full page illustrations. It is intended for a general readership, but would also suit anyone particularly interested in maps, graphic design, or the history of London.