Leading Quietly

Hbr's 10 Must Reads on Managing Yourself, Vol. 2 (with Bonus Article Be Your Own Best Advocate by Deborah M. Kolb)

Managing in the Gray: Five Timeless Questions for Resolving Your Toughest Problems at Work

Defining Moments: When Managers Must Choose Between Right and Right

Questions of Character: Illuminating the Heart of Leadership Through Literature - Joseph L. Badaracco