My interview with author and historian, Doug Brunt The hidden history of one of the world’s greatest inventors, a man who disrupted the status quo and then disappeared into thin air on the eve of World War I—this book answers the hundred-year-old mystery of what really became of Rudolf Diesel. https://douglasbrunt-author.com/ Go to https://expressvpn.com/benYT and find out how you can get 3 months of ExpressVPN free!