Examine the Old Testament listing of books in a Catholic, and a Protestant Bible, and you will normally find a discrepancy. You will find several more books in the Catholic Old Testament than in the Protestant Bible, the Protestant counting 39 and the Catholic counting some 46 or 47 books. The extra books in the Catholic Bible are referred to as the Apocryphal, or Deuterocanonical books, by Protestants and Catholic respectively. Apocrypha means "hidden", and Deuterocanonical means "second canon". This raises the obvious question, who has the correct list of books in their Old Testaments, the Protestant or the Catholic? (The New Testament is identical in the Protestant and Catholic Bibles.) For the disputed Old Testament there need not be any doubt as to who's list of books is correct, Catholic or Protestant, because the New Testament actually tells us not once, not twice, but three times......
Read your bible to find out the answer :) I know it and I'm not even a Christian. All Christians should know the answer.