""Dear Madam - You are surely informed about the situation of all Jews in Central Europe and this letter will not astonish you." In August 1939, just days before World War II broke out in Europe, a Jewish man in Vienna named Alfred Berger mailed a desperate letter to a stranger in America who shared his last name. "By pure chance I got your address . . . I beg you instantly to send for me and my wife..." Decades later, journalist Faris Cassell stumbled...