Rather off topic, I confess....
But we have an Inconvenient Truth (well, for Protestants, anyway)....
Since before Christianity, believers have spoken MUCH of "God's Word" and "God's inscripturated words" Judaism and Christianity are correctly seen as (at least in part) "People of the Book." We are one of 4 world religions were some objective, written words now in some book plays a very important and authoritative role.. Lutherans mention "Scripture" (we mean canonical, inscripturated words of God by that, term actually just means anything written down by anyone for any reason). ALL OVER our Confessions, there is an affirmation of the authority of the CANONICAL books.
But here's the thing.... what IS and is NOT "canonical" is a matter of TRADITION (as our Catholic and Orthodox friends try to tell us). What IS and IS NOT "canonical" (the rule or norm or "measuring tape" for evaluating and forming faith and practice) has NEVER been determined by some ecumenical, authoritative, decisive agency of THE CHURCH. We cannot point to some person for this.... or some ecumenical council (none of them dealt with this) or some Creed. It's TRADITION. It is the result of a GROWING CONSENSUS (never perfect!) of believers.
Yeah, I know.... 92 year old Mrs. Klineburg perhaps taught you in Fifth Grade Sunday School that God sent out this letter to all Christians in 30 AD listing the 66 books to be in all tomes with "BIBLE" written on the cover.... but sorry....with all due respect to Mrs. Klineburg now sainted in heaven.... it just ain't so. And I know Protestants are often told to HATE Tradition an that all Tradition is either Catholic or Satan (and probably both) but our Bible IS a product of Tradition. It's absurd to say "I reject Tradition and accept the Bible instead" (unless God DID send that letter (and it's in a museum somewhere).
Now, for the JEWS, this DID happen. But not before 90 AD, by which time all the Apostles (except perhaps John) had died; the JEWS settled all this - very officially, authoritatively and in a decisive and binding manner - for JUDAISM. It settled on the material that most Christians view as the 39 books of the OT. The 20 or more books that HAD been used and variously embraced that were not accepted by Jamnia in 90 AD all entirely fell from use by the Jews. The issue was settled BY A COUNCIL, by an official, formal, authoritative, binding decision that thus all Jews (then and thereafter) accepted. But this was for JUDAISM. Nothing remotely like that every happened in Christianity.
At one time, LOTS of books were used by Christians, VARIOUSLY embraced by VARIOUS groups of Christians in VARIOUS places). The Revelation of Peter and so many more. It was pretty "loose" with pre-Christian writtings, too (most Christians didn't seem to even know that the JEWS definitively determined on this).
But a CONSENSUS developed. An informal, non-official consensus. It formed round 27 New Covenant/Christian books. This is pretty solid and universal by 400. But not perfect.... the Revelation of John was questioned well into the middle ages.... many Catholic tomes included the Epistle to the Leodiceans as a 28th NT book which was never included in Eastern tomes. Additionally, Christians often considered some of them to be MORE canonical ("spoken in favor") than others ("spoken against"). This informal consensus wasn't perfect but it was strong. By 400 or so, it was pretty much settled. And by 1700, the Epistle to the Leodiceans stopped being included and the DUAL LEVEL (some of higher or lower canonicity) largely was dropped. But this was not until AFTER the Reformation (Luther and Calvin both still embraced the two different levels of canonicity for the NT).
For the OT, there soon developed an embrace a view virtually identical to the definitive declaration of the Jews in 90 AD at Jamnia (although it probably was determined ENTIRELY independent of that Jewish meeting) - all questions of the canonicity of those 39 books was gone by 400 or so. But there were 7-15 or so other books being used. So the consensus was about 39-50 or so pre-Christian books; more solid around the 39 than the others. The same DUAL LEVEL idea that existed for the NT also came to be for the OT only more so; some were spoken of not just as "spoken against" but as DEUTEROcanonical ("deutero" means under, below, secondary). Now, WHICH books are clearly canonical? Those 39. WHICH books are DEUTEROcanonical (useful, helpful but not fully canonical - not to be used as the sole norm for dogma for example)? THERE the consensus was weak and NOT universal. The Oriental Orthodox (rejecting the last 4 Ecumenical Councils) tended to have more DEUTEROcanonical OT books, the Eastern Orthodox fewer and the Roman Church fewer still - there NEVER was ANY consensus on which books are DEUTEROcanonical and which are not. But since no one saw them as fully canonical - the basis for the foundation of dogma - it really wasn't an issue; of all the things the Oriental Orthodox and Eastern Orthodox and Roman Catholic churches FOUGHT over (even excommunicated over!), this was NEVER an issue - even though the 3 DISAGREED with each other on this. Hey, if they are just for reading - no one is against that. If they are NOT to be the basis for dogma - then who cares? There was NO AGREEMENT on what books are and aren't DEUTEROcanonical because, to be blunt, it doesn't matter. LOTS of things are helpful and useful but not the foundation for dogma, heck churches today often use song lyrics, TV shows, movies, popular books, newstories, inspirational tales of saints .... useful, helpful, informative, inspirational, illustrative....but not necessarily the inerrant, verbally inspired, inscriputrated words of God and ERGO the canon/rule/norm for faith and practice in every sense equal to the Books of Moses or the Epistle to the Romans.
Protestants, Catholics and Orthodox should REJOICE in the reality of one of the oldest and strongest and ecumenical of ALL Christian Traditions: What we hold as canonical: It is 66 books (by our count). Yes, there were LOTS of other books used.... generally on a lower level than the 66.... generally NOT viewed as the canon/rule/norm for faith and practice, generally not perhaps the inerrant, verbally inspired, inscriputrated words of God and ERGO the canon/rule/norm for faith and practice in every sense equal to the Books of Moses or the Epistle to the Romans, but still pious, helpful, informative, inspirational - worthy of reading (even at the Mass; as a part of the Lectionary). We don't have a consensus on that list/number (and we NEVER have had) but this has never been an issue or problem.
In the Reformation, this issue came up: The Reformed community officially embraced Calvin's opinion that only the 66 should be embraced and the others should fade. The Anglican Church accepted a great many beyond the 66 but as DEUTEROcanonical. The Catholic Church at Trent accepted a smaller number than the OOC or EOC or the Anglican Church but IMPLIES they are all equal (this however was not actually stated at Trent but has been the interpretation of it). But the official DENOMINATIONAL tomes of the RCC and Anglican and Reformed (and LDS) churches are all unique, they are not the same as each other.
Sorry.
.