Leadership and Self-Deception
The Arbinger Institute
Quiet Leadership
David Rock

Opposable Mind
Roger L. Martin

The Power of Full Engagement
Jim Loehr & Tony Schwartz
Resonant Leadership
Richard Boyatzis & Annie McKee

Good to Great

Jim Collins

Personal Effectiveness
The 7 Habits of Highly Effective People
Stephen R. Covey

The Road Less Traveled
M. Scott Peck
The Essential Enneagram
David Daniels, M.D.

The Anatomy of Peace
The Arbinger Institute