By: Ralf Dobelli
Pages: 263
Self Help
My recommendation: 7 / 10
Date read: 2nd Jan 2026
Brief review: The key idea in the book is 'what not to do'. The book presents a collection of cognitive errors and thinking traps that people should avoid in decision-making, business, and everyday life. Through short chapters and practical examples, Dobelli explains how eliminating poor habits and flawed reasoning can improve judgment and outcomes. While the insights are useful and thought-provoking, the book is framed largely around mistakes rather than constructive principles. Compared to some of his earlier works, it feels less impactful. Overall, a decent and reflective read.
