This is not only about economics, it is about common aspects of life, like crime and cheating. The book contains several examples of how a brilliant researcher was able to shed light on these issues. The author acts like a detective, with a bottom-up approach, relying on statistical data analysis, and often based on the role of incentives in human behaviour. The abortion case stands aside and is, in my view, revelatory. Although apparently based on a syllogism, the conclusion put forward by Levitt, regarding abortion and crime rates, is nevertheless very convincing. Other cases, like the names assigned to child by parents, are not extraordinarely fascinating, but the pattern is the same: find the explaining thread in human behaviour. A good book for students in economics and social sciences in general, a intruigueing reading for all. At the same time, there are many other good micro-economists and statisticians out there who have written papers or books using a similar approach, but who are not so notorious.