I've just read this book in one sitting. It's about the hidden logic and the bigger picture of motivation. it's using stuff that has been presented in Dan Ariely's other great books. But it ties them so intelligently together, that I recommend to read it even if you have experienced the other books.

After I've dived deeper into politics, especially into the co-evolution of economy and labor (in its full complexity) it became more clear, how easy it is to destroy motivation and how difficult is to build. The subject is far more complex than we ever imagined.
It's worth investigating the nature of motivation, our partial blindness to the way it works, and how we can bridge this gap.
Oh, yes.