Brené Brown - The Power of Vulnerability
Liz Wiseman, Multipliers: How the Best Leaders Make Everyone Smarter
Julie Zhuo, The Making of a Manager: What to Do When Everyone Looks to You
Paul Sloane, Lateral Thinking for Every Day
Edward de Bono, Six Thinking Hats
How to Win Friends and Influence People, Dale Carnegie
Richard Potter, Director of Digital Strategy, Microsoft
Better Managers = Better Business, by Pete Fullard
Harvard Business Review (a wide range of leadership thinking)
David Clutterbuck (a good resource for coaching and mentoring thinking)
William Buist: Intentional Mastery
R. Michael Anderson: Leadership Mindset 2.0
Nick Howell: Great Coaching Questions
Nancy Kline: Time to Think
Julie Starr: The Coaching Manual