My source for this is The Jewish Study Bible (Oxford), 2nd Ed. One essay in the back is about the Dead Sea Scrolls, which AFFIRMS that the proto-Masoretic text, the Samaritan pentateuch, and the proto-Septuagint are all represented at Qumran. Well, Oxford U was originally a Christian university but I think these essays are all “Jewish” authors. So, we will have to agree to disagree – I don’t know enough to argue a point on my own, so I nearly always provide a source for what I say, if not immediately, then on the rebound.
I know nothing original about the Talmud, except to say that it is very polemical in opposing Christianity on every front (as I’ve been led to understand), including the canonicity of texts and the translation of Hebrew-to-Greek e.g. Is 7:14.
John Bergsma and Brant Pitre had a book published last year The Catholic Introduction to the Bible, Old Testament. I forgot what I was going to say – Now I don’t think that they made this point of why the book of Tobit is not in the Jewish canon, but I personally think it is because the storyline has a supernatural being, in this case an angel, taking the form of a human being. That’s WAY too close to God taking flesh, ala Jesus Christ. This may not be germaine to this overall topic but I thought I’d throw it in for the sake of conversation. Catholics are not supposed to bypass the idea of bringing Jews to faith in Jesus Christ. And, God-in-the-flesh is one of the hurdles that an observant Jew would have to overcome. We refer to this as the Incarnation, and the gospel is very incarnational.