Freakonomics - Steve Dubner
Professor Alan Norbury, Chief Technologist, Siemens
Richard Potter, Director of Digital Strategy, Microsoft
Scaling Up, by Verne Harnish
Better Managers = Better Business, by Pete Fullard
McKinsey Quarterly (a wide range of leadership, management and strategic thinking)
Harvard Business Review (a wide range of leadership thinking)
David Clutterbuck (a good resource for coaching and mentoring thinking)
R. Michael Anderson: Leadership Mindset 2.0
Nick Howell: Great Coaching Questions
Nancy Kline: Time to Think
Julie Starr: The Coaching Manual
Daniel Kahneman: Thinking, Fast and Slow
Caspar Craven: Be More Human
The Five Dysfunctions of a Team: A Leadership Fable by Patrick M. Lencioni