Sway: The Irresistible Pull of Irrational Behavior by Ori Brafman and Rom Brafman is a book about how people can be influenced. From college students living up to expectations to military recruits meeting drill instructor expectations and many other applications in between.
To be a good leader, a person must influence those they are trying to lead. To be a good Project Manager or Business Analyst, a person should also be a good leader. The theories in this book can help you to improve your leadership ability and help you build your team into a more effective one. I highly recommend reading this to anyone leading, or even just a part of, a team.