For eight years, the business magazine impulse has interviewed entrepreneurs reflecting on their lives about their bitterest defeats. Now, the key experiences are being published as a book in its third, expanded edition: a unique project in a country where few openly discuss mistakes. It documents 100 confessions along with black-and-white portraits of individuals who built billion-dollar companies from scratch, such as Dirk Rossmann or OBI founder Manfred Maus, families that shaped the country for decades, like the Oetkers or the Fischer dynasty, and medium-sized business owners who successfully established major brands, like Dieter Burmester with his luxury audio systems, skateboard manufacturer Titus Dittmann, or "cashmere queen" Iris von Arnim. New contributors include Kurt Stürken from Leuchtturm Albenverlag and Vaude founder Albrecht von Dewitz. These personal confessions provide a different perspective on recent economic history, from post-war reconstruction to the New Economy and the latest financial crisis. From the recurring behavioral patterns of these mistakes, impulse editor-in-chief Nikolaus Förster has derived ten management lessons: entrepreneurial principles for sustainable success. The book is further expanded with a new chapter in which Förster describes how past mistakes can be transformed into opportunities.