A #1 New York Times Bestselling Author -- On the ocean liner Mauretania , two European scientists with a dramatic new invention are barely rescued from abduction by the Van Dorn Detective Agency?s intrepid chief investigator, Isaac Bell. Unfortunately, they are not so lucky the second time -- and one of the scientists dies. War clouds are looming, and a ruthless espionage agent has spotted a priceless opportunity to give the Germans an edge. It?s up to Bell to figure out who he is, what he?s up to, and stop him.