At the beginning of the Nazi period, 25,000 Jewish people lived in Tarnow, Poland. By the end of the Second World War, nine remained. Like Anne Frank, Israel Unger and his family hid for two years in an attic crawl space above the Dagnan flour mill in Tarnow. Their stove was the chimney that went up through the attic; their windows were cracks in the wall. Survival depended on the food the adults were able to forage outside at night. Against all...