The Alchemy of Air: A Jewish Genius, a Doomed Tycoon, and the Scientific Discovery That Fed the World but Fueled the Rise of Hitler

by Thomas Hager

He became a sort of middleman for a shadowy business in illicit arms, fielding high-level inquiries about gas warfare and passing them on to a man he knew who had run a mustard-gas plant during the war. One of the interested parties was Spain,