Catholic and Protestant Bibles both include 27  books in the New Testament. Protestant Bibles have only 39 books in the Old Testament, however, while Catholic Bibles have 46.

The seven additional books included in Catholic Bibles are Tobit, Judith, 1 and 2 Maccabees, Wisdom, Sirach, and Baruch. Catholic Bibles also include sections in the Books of Esther and Daniel which are not found in Protestant Bibles. These books are called the deuterocanonical books. The Caholic Church believes these books to be inspired by the Holy Spirit, which is why they are included in the Catholic Bible.