Leaders Summit is a consulting firm which provides leadership training and consulting for nonprofit and corporate organizations. They have recommended the following books for their twelve indispensable leadership skills.
Vision
Nanus, B. (1991). Visionary Leadership, San Francisco: Jossey-Bass.
Life-long-learning
Bennis, W. (2003). On Becoming A Leader, New York: Basic Books.
Team Building
Harvard Business Press (2004). Teams That Click, Boston: Harvard Business Press.
Authenticity
Buckingham, M. & Clifton, D (2001). Now, Discover Your Strengths, New York: The Free Press.
Change-agent
Kotter, J. (1996). Leading Change, Boston: Harvard Business School Press.
Emotional Intelligence
Goleman, D. (2002). Primal Leadership: Learning to Lead with Emotional Intelligence, New York: Bantam Books.
Execution
Bossidy & Charan (2002). Execution: The Discipline of Getting Things Done, New York: Crown Press.
People Skills
Carnegie, D. (1936). How to Win Friends and Influence People, New York: Simon and Schuster.
Communication
Clarke & Crossland (2002). The Leader’s Voice, New York: Select Books.
Inspire
Greenleaf, R. (1977). Servant Leadership, New York: Paulist Press.
Social Intelligence
Albrecht, K. (2006). Social Intelligence – The New Science of Success, San Francisco: Jossey-Bass.
Multi-topic books:
Kouzes & Posner (2003). The Leadership Challenge, San Francisco: Jossey-Bass.
Heil, Parker, and Tate (1995). Leadership and the Customer Revolution, New York: Van Nostrand Reinhold.