Book quite comprehensive ... maybe even too! More than 400 pages when other code books contain about 200 pages. Certain chapter are useless and certain topic they complicate the explanations too. Another big worry panels are dispersed around the book so galley, also the category "crossing, overtaking" instead of all together in a single chapter all is mixed in the book. And finally the book does not contain many new panels that are appeared last month so its out of date.