Why I recommend Waltzing With Bears:
Reason 1: It is a very fast read covering many topics concisely and accurately
Reason 2: It is the best book I've read about risk and managing risk
Reason 3: And the shortest best book on estimating
It has been 3-4 years since I read this book and I still recommend it to every PM and PMO and any other team member who is interested in the topics in it.