The Five Dysfunctions of a Team
This bestseller, written in Lencioni’s fabled fable style, is an excellent and simple roadmap for diagnosing and setting up a team for success and productive functioning.

The Wisdom of Teams, by Jon Katzenbach and Douglas Smith
This is based on extensive research from when Katzenbach headed the organization practice at McKinsey. It is solid and as a practical guide to making your team Peak Performing it has stood the test of time.