Question: What are the “Deuterocanonical” books?
Answer: Called the Apcorypha by Protestants, seven books of the Old Testament: Tobias, Judith, Baruch, Ecclesiasticus, Wisdom, First and Second Machabees; also certain additions to Esther and Daniel. These books were included in the Jewish Septuagint and adopted as canon by early Christians. In the first century, a large group of Jews met at Javneh and removed these books from canon. The Catholic Church disagreed and kept the books. During the Protestant Reformation, Martin Luther removed these books from the Old Testament to match the newer Jewish canon.