After the 917 broke Porsche's 19-year drought at Le Mans in 1970, it went on to win the Can-Am Series two years running. Porsche expert Peter Morgan gained unprecedented access to Porsche records and 917 engineers and drivers to bring enthusiasts the story of this legendary race car in full-color. Detailed are the rivalry between Ferry Porsche's sons and his nephew, Ferdinand Piech, who spearheaded the development of the 917. Engineers describe the development of turbochargers for auto racing, while drivers like Dickie Attwood, Hans Herrmann, and Derek Bell chronicle the 917's brilliant motorsport career.