Drive: The Surprising Truth About What Motivates Us
by Daniel H. Pink

Good To Great
by Jim Collins

Outliers: The Story of Success
by Malcolm Gladwell

Sway: The Irresistible Pull of Irrational Behavior
by Ori Brafman, and Rom Brafman

Switch: How to Change Things When Change is Hard
by Chip Heath and Dan Heath

The Leadership Challenge
by James Kouzes and Barry Posner

What Got You Here Won’t Get You There
by Marshall Goldsmith