On Becoming a Leader
by Warren Bennis
A reflection on the qualities and knowledge required by leaders in the 21st century: The ability to empathise with others and reflect on your own practice, the need to understand the context in which you are operating and self-awareness.
This is a wonderful read if you're not looking for a quick "how to lead" guide but want to think about what might help you develop as a person in a position of leadership in the long-term.
"Experiences aren't truly yours until you think about them, analyze them, examine them, question them, reflect on them and finally understand them."