Free Thinking - Michael Lewis.

The Big Short, Liar's Poker and Flash Boys expose the culture of Wall Street trading works. The Blind Side, Coach and Moneyball explore the world of sport. For his latest book ‘The Undoing Project’, Michael Lewis looks at the friendship of two Nobel Prize-winning psychologists, Daniel Kahneman and Amos Tversky. Matthew Sweet talks to Michael Lewis about his investigative methods and how this latest book fits into his interest in the psychology of sportsmen, bankers and risk takers.

The Undoing Project is out now.

Producer: Fiona McLean