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I don't know the book, Wuff, but it seems to be written in 1986. However, the content will only be as good as the research - and it is easy to find information that may not be quite what it seems. If you search for Baccarat Crystal, for example, you can find the legitimate company website (baccarat.com). But you will also find 'baccaratcrystalglass.com' - an apparently authentic, informative, and official looking website. It may all be good information (I have not checked), but the website is actually registered to a Portuguese gentleman in a shopping centre in Portugal...
Alan