The book is about the research done by Philip Tetlock on a group of people he calls "superforecasters". These are people who have shown an ability to make accurate predictions about future events, often outperforming experts in the field.

The book goes into detail about the methods used by these superforecasters, and how anyone can learn to make more accurate predictions. It also discusses the importance of thinking probabilistically, and how to avoid common biases that lead to inaccurate predictions.

Overall, I found the book to be fascinating and well-written. I would recommend it to anyone interested in learning more about how to make better predictions.