Another Freakonomics-style book, this one looks at why people do some very silly things. Taking off in a plane in dangerous circumstances, ignoring a concert violinist because he plays on the subway, and a number of other strange things that our brain does to us.
Particularly interesting was the section on how our expectations of someone or something tend to make that person react to our expectations... by meeting them in one way or another.
I liked the book, as I like most mass-market science with simple white covers and one-word titles. :) A fun read.