This is an account of the lives of two psychologists, Daniel Kahneman and Amos Tversky, both geniuses, each with very different personalities, who worked closely together over many years, reshaping the way we think about economic behaviour. Together, they transcended their individual abilities, and transformed ideas about how people make decisions, not at all like the psychologically unreal “rational agents” of economic theory, but instead with their various biases and preferences, aversions, risk-taking behaviours, inability to reason statistically, and more. A fascinating read.