other people have commented thoroughly about the generalities of this book, and i by-and-large agree. i'd like to add, however, that some of the most interesting parts of this book are the omissions.
for example, they author segues straight from talking about Ninja Gaiden to NOJ/NOA's localization process and standards for content. he mentions that religious iconography, drug use, etc, are all prohibited from being portrayed in Nintendo software, and the list of prohibited content includes cigarette smoking.
the author fails to note the irony, however, that in the aforementioned game there's a bad guy leaning against a light post smoking a cigarette he throws aside before dashing at you. i can only assume it slipped past the censors without them catching it, but my friends and i had noticed it years ago and marvelled that it had been made it through the review process intact.
it's these kinds of things that make me feel like this book is a good general source, but anything deeper than a surface look at the topics covered would require some additional reading/sources.
there are quite a few nuggets of interesting trivia in here - more than enough to make a gamer smile (dragon quest being legally prohibited in Japan from selling on any day except Sunday or a holiday, for example). my copy was a gift; i can attest that it makes a fine one.