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.

At the outset of this new age of electricity and oil, Europe stood on the precipice of war. Rudolf Diesel grew increasingly concerned about Germany’s rising nationalism and military spending. The inventor was on his way to London to establish a new company that would help Britain improve its failing submarine program when he disappeared.

Now, New York Times bestselling author Douglas Brunt reopens the case and provides an astonishing new conclusion about Diesel’s fate.