Four books that will change your perspective on what it means to be a leader

What does it mean to be an effective leader? How do you inspire, lead and motivate others? And how can you too become such a leader, given the rapid evolution of modern technology and changes taking place both in society and in the understanding of a manager's role? If you are interested in these questions (and more), in management, and in what it means to be a leader today, here are four books you will find interesting.