72 (or 73 if you count the Lamentations of Jeremiah as a separate book). Good review here every Catholic should know.
Catholic Stand, Ray Sullivan: So why does the Catholic Bible have 73 books, while the Protestant Bible has only 66 books? Some Protestants believe that the Catholic Church added 7 books to the Bible at the Council of Trent in response to Luther’s Reformation, but that couldn’t be further from the truth. Article is here.