2. Authority. Roman Catholic Church books of the Old Testament and New Testament Canon -11 books of the Apocrypha (These books are considered to be deutero-canonical or having secondary status to the other 66 books) Church Tradition Eastern Orthodox Church -66 books of the Old Testament and New Testament Canon all 14 books of the Apocrypha Church Tradition Protestant Churches -66 books of the Old Testament and New Testament Canon The Bible is by far the most reliable ancient document in existence today. This is not a statement of its inspiration, but rather of it being a reliable record of what was originally written. This is confirmed by the tests typically applied to any historical document and by archaeological finds.