I enjoyed this, and it provided some great food for thought, but I definitely thought it was lacking in some areas. With edgy chapter titles like "How is the Ku Klux Klan Like a Group of Real-Estate Agents?", this is obviously a pop piece meant to make a usually boring field accessible to the masses. It does that well, but I would have enjoyed some more in-depth information throughout the book. It seems like the surface is just barely skimmed on most of the topics explored here, and I don't know that the authors always provide ample evidence to back up their views.
Also, it was much shorter than I expected. I read this on my kindle and had a bit of a shock when I reached the epilogue, since the status bar said I was only at 55%! The rest of the book is appendices, excerpts from the authors' blog and newspaper columns, and various other extras -- some interesting, but many just a repeat of what was already in the main text. Annoying.