If I was to say that the Bible is work of fiction I would annoy the believers here at MT beyond all measure and, odd as it might sound, I don't like to do that. But it is not a work of fact. It is a social control propoganda instrument that has been rewritten several times to better maintain that control as the social setting evolved.
Compare the present day versions (the very existence of different versions is a signal of the problem) to the oldest complete text that was found a while back. The differences are astounding, particularly with regard to those pivotal points about Christ the Saviour and the Resurection.
As I ever say, people are free to believe in whatever mythos they want and are free to substantiate that for themselves on whatever premis they wish. It only becomes a problem when it becomes more than that and groups begin to 'interpret' scripture to suit their purposes and 'damn' those that will not adhere to that interpretation.
Science does much the same thing except that that philosophy of thought is very deliberately based upon falsifiability not infallability. To my mind, as I've said before, the phrase "Divinely inspired by God" equates to "The Abrogation of Reason", that is most especially so when the entire ediface stands upon a book the provenance of which is utterly discredited.