We assume they are all about the Twelve Prophets and similar scrolls we know about.
What if a surprising new find is made?
I just heard on a discussion on the radio about how the inclusion and exclusion of books in the various Bibles took place. Around 300 CE the books like Enoch were taken out despite being commonly accepted at one time.
There are seven books in the Catholic Bible — Baruch, Judith, 1 and 2 Maccabees, Sirach, Tobit and Wisdom — that are not included in the Protestant version (or the Jewish one. These books are referred to as the deuterocanonical books.
Over hundreds of years, the Jews accepted the ones known as the 24 books in the Hebrew Holy Scriptures known as the Tanach (Torah,Prophets,Writings). Called the Old Testament by non-Jews.
Interesting fact in the discussion I heard: the Bible is now “a closed book.” “Even if a provable new find of a further book is made, it cannot be accepted in the closed Bible.”
That’s the part I thought of when I saw new finds were possible. Probably just more variations on the earlier finds, but we don’t know for sure, do we?
Only Jesus Christ himself could make such a decree. Hoever, the more time goes on, the more challenging it gets to prove the provanence of a newly found ancient text, even if it were found in cave in Qumran.