My rating: 5 of 5 stars
Just as good as its predecessor, SuperFreakonomics is an easy, engaging, fascinating read. It makes economics interesting and provides the "why" to questions most people probably never think to ask.
One diversion (and improvement) this book takes from the Freakonomics is the association of two unalike things: a street prostitute and a department store santa or Al Gore and Mt Pinatubo, just to take two examples from the table of contents. Using these similes to arouse reader interest is a subtle literary tactic that gives variation to the standard Q&A format this book could easily take.
With the success of this follow-up, I can imagine these books becoming a series. If they do, I will certainly read it!