Actually one of the reasons for writing Bible based novels is to encourage people to read the Bible; to discover what is Bible fact and what is a product of my imagination?
While I hope more Christians write on Biblical events and people, I recognize that it places a heavy burden on that writer.
But it is worth it.
I love to write, but there is something special about writing Bible based stories. I think the reason is that the stories not only bring the Bible alive to readers but to myself as well. In so doing I am able to dig deeper and gain an understanding of the events and people. And of God!