Freakonomics

Interesting concept, but I find it a bit...lackluster.
His purpose: expose people to a different way of thinking about things they are told, assume, are exposed to.
Problem: He sets himself up as being basically above other experts and founds his answers as if THAT is the correct answer. If you are trying to teach people not to just believe or accept everything they read/hear, don't write a book expecting people to accept your answers and solutions that way.
This book would have been much more powerful if he presented his solutions as POSSIBILITIES instead of "the real answer".
Of course, perhaps I look at it this way because I am a person who already questions things when I hear about them. I don't accept things as truths until I can experiment on them and test them out and see how I feel about them.