USCCB - The New American Bible
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 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 Catholic Church considers these books (deuterocanonical books) to be inspired by the Holy Spirit.