What do Hedy Lamarr, avant-garde composer George Antheil, and your cell phone have in common? The answer is spread-spectrum radio: a revolutionary inven­tion based on the rapid switching of communications sig­nals among a spread of different frequencies. Without this technology, we would not have the digital comforts that we take for granted today. Only a writer of Richard Rhodes’s caliber could do justice to this remarkable story. Unhappily married to a Nazi arms dealer, Lamarr fled to America at the start of World War II; she brought with her not only her theatrical talent but also a gift for technical innovation. An introduction to Antheil at a Hollywood dinner table culminated in a U.S. patent for a jam- proof radio guidance system for torpedoes—the unlikely duo’s gift to the U.
