We highly recommend the following resources:

Leadership bookshelf:

The Living Company: Habits for Survival in a Turbulent Business Environment
Arie de Gues

Power Up: Transforming Organizations Through Shared Leadership
David L. Bradford and Allan R. Cohen

Execution: The Discipline of Getting Things Done
Larry Bossidy and Ram Charan

Leadership and Self-Deception: Getting Out of the Box
The Arbinger Institute

Organizational Culture and Leadership
Edgar H. Schein

The Corporate Culture Survival Guide: Sense and Nonsense About Culture Change
Edgar H. Schein

Built to Last: Successful Habits of Visionary Companies
James C. Collins and Jerry I. Porras

Good to Great: Why Some Companies Make the Leap …And Others Don’t
Jim Collins

Principle-Centered Leadership (audiobook)
Stephen R. Covey

Leadership is an Art
Max DePree

Discovering the Soul of Service: The Nine Drivers of Sustainable Business Success
Leonard L. Berry

Personal Development bookshelf:

The Corporate Mystic: A Guidebook for Visionaries With Their Feet On The Ground
Gay Hendricks and Kate Ludeman

The Path
Laurie Beth Jones

The Four Agreements
Don Miguel Ruiz

Mastery: The Keys to Success and Long-Term Fulfillment
George Leonard

Retooling on the Run: Real Change for Leaders With No Time
Stuart Heller and David Sheppard Surrenda

The Seven Habits of Highly Effective People
Stephen R. Covey

The Power of Now
Eckhart Tolle

Sales conversations bookshelf:

The “I Hate Selling” Book: Business-Building Advice for Consultants, Attorneys, Accountants, Engineers, Architects and Other Professionals
Allan S. Boress

Getting Into Your Customer’s Head: The 8 Secret Roles of Selling Your Competitors Don’t Know
Kevin Davis