Other reviewers seem to expect an academic text or a production manual. Whilst this book is neither of those, it is more than just a graphic design sourcebook. It presents some contemporary best-of-breed examples and places them in context.
Chapters are: Informing the Traveller, Explaining How Things Work, Controlling the Input, Interacting with the Screen, Exploring the 3-D Interface and Mapping the Internal and External Worlds. Each chapter has at least one case study, and numerous other samples of information graphics.
Cases include airport signage from Schipol and Dusseldorf, air traffic control and aircraft cockpit panels (which should satisfy propellor-heads!), as well as educational, cartographic, architectural and Web examples. Only the latter are starting to date - there's still much to be learnt here.