For author Jürgen Barth, this book was a matter of the heart. After all, the racing driver and long-time Porsche employee achieved the greatest success of his career with his victory at the 24 Hours of Le Mans in a Porsche 936. Together with his co-author Bernd Dobronz, he meticulously traces not only the creation and development of this open sports prototype but also provides an exciting and informative account of all factory entries of the Porsche 936 in the Sports Car World Championship races and at the 24 Hours of Le Mans, based on records made by the engineers of that time. This work is not only a monograph of a success model in Porsche's racing history that has received far too little attention until now. The authors have also succeeded in telling the stories surrounding the triumphs and tragedies of that era, capturing the atmosphere of the time.