Course, you Know, that the Torah in the beginning was memorized by Rabbis "God books" were looked down on.. it was deemed not a good thing to even speak let alone WRITE Gods name.. or anything else of God..
By thirteen a boy was expected to have memorized the Torah(first 5 books) completely.. as much as he could..
That slowly changed but remnants of that idea you can still find in Judaism.. somewhat..
Back to the question.. A real God does not need a book, any book.. God is NOT creating an organization with bylaws he is creating a family with members in particular.. its ..NOT..what you BELIEVE that counts it is Who you ARE that counts(book of life)..
Truly, when we read everything as a whole from Genesis to Revelation it is only obvious that Jesus Christ was not enfleshed to start a religion but rather to gather the family.
He is the First Cause and the Final Cause. The Alpha and the Omega.
Everything moves towards that Final Cause, that kingdom come, that new heaven and earth in which we are a family.