LOL ... ever heard of the Septuagint?
You miss the whole point. Of course, there were books and writings, but they became the official version of the Bible only after the books in the Bible were formalized in AD 384 in the Council of Rome. The Holy Spirit that insured the accuracy of the judgment of the Church fathers in presenting the true written Word of God did not evaporate later with the various schisms, and where these schematic beliefs then began to divide among themselves.