What is a good book for studying incentives? I am looking for a book, which gives a broad overview of all the main theories regarding incentives. Using this book, I would like to further my understanding of things like: 


Why slot machines keeps people motivated to play
Why extrinsic motivation is weaker than intrinsic motivation


Economical theories should at least contribute to the understanding of incentives.
I guess what you are looking for is readings on applied behavioral economics. Here is a popular favourite: Freakonomics