These useful and orginal sources of information beyond the book can be accessed directly by clicking on the links provided.

Hans Holbein the Younger’s 1533 portrait, The Ambassadors, at the National Portrait Gallery

Alistair Adams’ 2013 portrait of Tony Blair at the National Portrait Gallery

Leadership on screen

• Christopher Nolan’s modern classic, The Dark Knight (2008), presents a fascinating character list for any leadership study. Who, if anyone, will lead Gotham through these dark and uncertain times?