THE NEW INTERNATIONAL BESTSELLER FROM THE AUTHOR OF THE BIG SHORT AND FLASH BOYS 'A gripping account of how two psychologists reshaped the way we think ... What a story it is' Sunday Times 'You'll love it ... full of surprises and no small degree of tragedy' Tim Harford 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 'Psychology's Lennon and McCartney ... Lewis is exactly the storyteller they deserve' Observer