Noah's flood is a myth, a complete and utter myth...there is no evidence for it at all and it could not have happened for many reasons. Yet Jesus (and Peter) believed it.
It is easy for characters in story books to believe spurious events.
When Paul (probably a real person) spoke of "all scripture being inspired of God and beneficial" there was no Bible. In context with Greek language usage of his time, "all scripture" just referred to the category of any writings of an upbuilding nature. What a folly it is to be a literalist!
The Bible is just a list of texts which a religious authority approves for the promotion of its own doctrines.
So Freeandclear should you want more academic books than already mentioned, anything by the outstanding textual and history scholar Thomas L Thompson is authoritative. I recommend his Messiah Myth, Pimlico,2007.(The Near Eastern roots of Jesus and David). Also, The Bible in History; How writers create a past, Pimlico,1999 by the same author.