Daniel Kahneman spent part of his childhood in Nazi-occupied Paris. Like the other Jews, he had to wear a Star of David on the outside of his clothing. One evening, when he was about 7 years old, he stayed late at a friend’s house, past the 6 p.m. curfew.

He turned his sweater inside out to hide the star and tried to sneak home. A German SS trooper approached him on the street, picked him up and gave him a long, emotional hug. The soldier displayed a photo of his own son, spoke passionately about how much he missed him and gave Kahneman some money as a sentimental present. The whole time Kahneman was terrified that the SS trooper might notice the yellow star peeking out from inside his sweater.

Kahneman finally made it home, convinced that people are complicated and bizarre. He went on to become one of the world’s most influential psychologists and to win the Nobel in economic science.

Kahneman doesn’t actually tell that childhood story in his forthcoming book. “Thinking, Fast and Slow” is an intellectual memoir, not a personal one. The book is, nonetheless, sure to be a major intellectual event (look for an excerpt in The Times Magazine this Sunday) because it superbly encapsulates Kahneman’s research, and the vast tide of work that has been sparked by it.