Overcoming the Five Dysfunctions of a Team

I enjoyed the fact it could've been part of the first book, but it's not. It iterates over the dysfunctions one more time, but with in depth explanations, providing situational ideas. It also comes with a set of practices and planned timeline for action. A bit more theoretical and informative.
If you're not into the first book, don't read this one. If you haven't read it - you can still read and grasp this one.