It's focused on the resulting economics but I've heard great things about the book Misbehaving by Thaler. The remarks under "Outtakes" here give some context:
I'm reading this now and enjoy it very much, it's a very fast read by economics book standards. That is, though, because it's not dense with theory for better and for worse.
If your expectations are "reasonably entertaining book that's reasonably informative" and you're remotely interested in econ or behavior, it really hits the spot.
Agreed. I found it particularly interesting because I had Thaler as a professor at Cornell just as the field was developing. I took a course with him and another professor called Behavioral Decision Theory that was an early attempt to teach some of the irrational approaches that people actually use to make decisions.
http://www.misbehavingbook.org