I also follow The Dilbert Blog (http://dilbertblog.typepad.com/the_dilbert_blog/rss.xml) , though it isn't about Dilbert. It is thoughts, observations and provocation from Scott Adams, and it makes for entertaining reading.
Given my enjoyment of Mr Adams' output, I bought the book Dilbert and the Way of the Weasel and it is every bit as good I could have hoped. It is interspersed with Dilbert comics but I find I generally laugh more at the humourous turns of phrase in the main prose. There are also snippets of emails from the real world, which are hideous tales of what goes on in businesses today. For example:
Mr. Adams, My boss explained to me how she delays responding to e-mails by varying amounts of time, just to impress upon people their relative standing in terms of power.I haven't read the Dilbert Principle, but on the strength of this book I will be soon. Highly recommended, especially if you work for a large corporation.