This a very entertaining book which can be read between stops on the bus or tube, or just for fun on a rainy afternoon. Although the timeline section gives you the very basic history of the tube, within the book itself I'd have expected at least some facts on tunneling techniques, the development of the trains and signalling, but no. The section on 'Trains in Drains and Daft Ideas' is fascinating and a great read, but a section on the ideas that did work would have made this a far more complete publication. On far too many occasions the book ends up providing a series of facts in long lists, like a dreaded answer sheet from a pub quiz. David Long does provide an extensive bibliography in the back of the book, though a shorter `recommended reading' list may have been more useful. It is a good read, but for those interested in more than just quirky facts, be warned you'll need to buy something else too, such as the Shire Guide publication, even though the book's forward boasts that the book `will tell you everything you need to know...' The book is well worth its meagre asking price, it's a handy size to carry around and the hard cover gives it a nice tactile quality. Just don't expect it to be the only book you'll ever need if you're fascinated by the London Underground. Had it been possible I'd have given it 3.5 stars.