WorkLife with Adam Grant. Organisational Psychologist
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
Simon Sinek, Leaders Eat Last: Why Some Teams Pull Together and Others Don't
Patrick Lencioni, The Five Dysfunctions of a Team: A Leadership Fable
Brené Brown, Dare to Lead: Brave Work. Tough Conversations. Whole Hearts.
Edward de Bono, Six Thinking Hats
Professor Alan Norbury, Chief Technologist, Siemens
Richard Potter, Director of Digital Strategy, Microsoft
Better Managers = Better Business, by Pete Fullard
David Clutterbuck (a good resource for coaching and mentoring thinking)
Stephen Covey: The 7 Habits of Highly Effective People
Nick Howell: Great Coaching Questions
Julie Starr: The Coaching Manual