In 1969 two men met on a university campus. Their names were Daniel Kahneman and Amos Tversky. They were different in every way. But they were both obsessed with the human mind - and both happened to be geniuses. Together, they would change the way we see the world.

'An enchanted collaboration ... During the final pages, I was blinking back tears' The New York Times.

'My favourite writer full stop. Engages both heart and brain like no other' Daily Telegraph.

'Brilliant, a wonderful book, a masterclass' Spectator.