Dr Susan Williams is a senior research fellow in the School of Advanced Study, University of London. Her pathbreaking books include Who Killed Hammarskjoeld?, which in 2015 triggered a new, ongoing UN investigation into the death of the UN Secretary-General; Spies in the Congo, which spotlights the link between US espionage in the Congo and the atomic bombs dropped on Japan in 1945; Colour Bar, the story of Botswana's founding president, which was made into the major 2016 film A United Kingdom; and The People's King, which presents an original perspective on the abdication of Edward VIII and his marriage to Wallis Simpson.