At 19, Rabbi Ephraim Oshry wrote a book on Talmud. He was recognized as a posek, an expert on Jewish law, in Kovno, the second-largest city in Lithuania.
Within a decade, his knowledge would be tested in a way he never foresaw. During the three years of German occupation, as one of the few remaining rabbis in the Kovno ghetto, he would answer questions that had life-and-death implications: Was suicide permissible? Could a woman who had become pregnant in the ghetto undergo an abortion? Could a Caesarean section be performed on a dead woman?