The Motivation Manifesto, Brendon Burchard (free book, just pay S&H)
The Power of Now: A Guide to Spiritual Enlightenment, Eckhart Tolle
A New Earth: Awakening to Your Life's Purpose, Eckart Tolle
Crucial Conversations: Tools for Talking When Stakes Are High, Kerry Patterson, Joseph Grenny, Ron McMillan, Al Switzler, Stephen R. Covey
The Functions of the Executive, Chester I. Barnard
The Human Group, George C. Homans
Survival of the Savvy: High-Integrity Political Tactics for Career and Company Success, Rick Brandon, Ph.D., Marty Seldman, Ph.D.
The Charge: Activating the 10 Human Drives That Make You Feel Alive, Brendon Burchard