Seth Godin has been slaughtering sacred cows (and replacing them with purple ones) for years.
All Marketers Are Liars is not quite as iconoclastic as it sounds; as the back of the book confesses, "Marketers aren't really liars... but they do tell great stories." Far from being a manifesto for deceiving the public, this is a book about the power of authenticity.
http://www.AllMarketersAreLiars.com(for details of the book - the blog does seem to have got slightly stuck on the negative aspects of "story")