Bennis, Warren. On Becoming a Leader.  Perseus Books, 1994

Bossidy, Larry and Charam, Ram. Execution: The Art of Getting Things Done. New York: Crown, 2002

Byham, William with Cox, Jeff.  Zapp!  The Lightning of Empowerment. New York: Ballantine 1998

Collins, Jim. Good to Great. HarperCollins, 2001

DePree, Max. Leadership is an Art. New York: Dell Publishing, 1989

Gardner, Howard. Leading Minds: An Anatomy of Leadership. New York: Basic Books, 1996

Gardner, John W. On Leadership. New York: The Free Press, 1993

Goleman, Daniel. Working with Emotional Intelligence. New York: Bantam Books, 1998

Hiam, Alexander. Motivating & Rewarding Employees. Massachusetts: Adams Media, 1999

Harvard Business Review on Leadership. Boston: Harvard Business School Press, 1998

Kouzes, James M. and Barry, Posner Z.  Encouraging the Heart: A Leader’s Guide to Rewarding and Recognizing Others.  San Francisco: Jossey-Bass, 1999

Maxwell, John C. The 21 Irrefutable Laws of Leadership. Nashville: Thomas Nelson Publishers, 1998

Morrell, Margot and Capparell, Stephanie. Shackleton's Way: Leadership Lessons from the Great Antarctic Explorer. Penguin USA, 2002

Phillips, Donald T. The Founding Fathers on Leadership. New York: Warner Books, 1998

Quigley, Joseph V. Vision, How Leaders Develop It, Share It, & Sustain It. McGraw-Hill, 1993

Seligman, Martin. Learned Optimism: How to Change Your Mind and Your Life. New York: Pocket Books, 1998

NOTE:   I especially recommend Bennis, Gardner (John), co-authors Morrell & Capparell and DePree to persons seeking an excellent foundational understanding of leadership and to those transitioning from a position which calls for a greater leadership (vs. managerial) focus.