I just finished reading The Diesel Odyssey of Clessie Cummins by his son Lyle Cummins. As someone who has spent their entire career in the Diesel and Diesel Fuel System Industry, I found this a fascinating read as to how a creative individual with an 8th grade education formed, promoted and influenced the largest independent diesel manufacturer in the world and it’s fuel system. His and adventures, exploits, entrepreneurial endeavors and personal relationships from youth through retirement form a very interesting story. Many exciting incidents! Great story about the dawn of the diesel automotive/truck engine and a piece of fuel system history. A highly recommended read.