They Must Not Be Forgotten Heroic Catholic Priests and Nuns who Saved People from the Holocaust" is a compilation of true stories of rescue by Catholic priests and nuns in Europe during World War II. Based on documented accounts, these stories depict how goodness can prevail even in the darkest times. The heroism and sacrifice of the priests and nuns whose stories are told in the book have been recognized and honored by the Yad Vashem, the Holocaust documentation Center in Israel and by the Catholic church.