On Leadership

I am currently interested in the question of what makes a good leader. I cringe at the idea of separating people into categories of "leader" and "follower," as I believe everyone is called at times to lead and to follow and that much damage has been done by insisting that certain groups of people were born to be either leaders or followers. But given that all or most people have leadership abilities, when people are, in fact leading, what attributes do they possess that make them good at what they do?

The Abbess a month or so ago mentioned several books on leadership. One was by MaryKate Morse, but I can't think of its name. Any other books to recommend?