I knew I was getting the abridged audiobook from the 1994 edition, but the content is drastically different from the 2006 version. The Audible version is listed along with the 2006 edition is you search audio, so if you want the main points of the updated text, you won't be disappointed. However, know that you are missing out on a lot of information and helpful illustrations. I wish an UNABRIDGED audiobook was available for the updated edition.
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