Samir Patel's Reviews > Thinking, Fast and Slow

Newbies to behavioral econ are better off starting with Misbehaving by Richard Thaler, which is a lot less technical and dense but still gets you to the same point of understanding.

As far as the book: it's great. Only problems are: A) after a certain point (say halfway through), it starts to get repetitious, and more concerningly B) that Kahneman eventually overinterprets his data and veers off into nihilism. Neither of those make it a bad book, though - just read the first half and then go do something else.