Agata Tuszynska grew up in a country--Communist Poland--beset by anti-Semitism, rarely hearing the word "Jew" (only from her Polish Catholic father, and then, always spoken in derision; "the Jews are responsible for it all," he would say). The author writes of how she set out to investigate her past and begin a journey to uncover the truth of her family's history during World War II. Her book tells the story of her discoveries and of her willingness...