When Germany invaded the Netherlands in 1940, twenty-one year old Dutchman Gys van Beek was offered multiple times to become a high-ranked official for the Nazis. But though the Dutch were promised riches and privileges beyond imagination, Gys refused. Instead, he secretly joined the Resistance, an underground organization resolved to defying Hitler's regime. Working for the Resistance, Gys rescued several people from capture and death - yet perhaps the most prominent remains an American pilot named Howard Moebius, blasted from the sky in his P-51 Mustang on September 19, 1944. Now, Gys's...