What Came First – Bible or Quran?

If tomorrow morning, I make a claim that an angel of God had appeared to me in the night and told me to write a new holy book and to call it the final and ultimate scriptures for the whole world, would you accept what I say?

You’d laugh at me. You’d call me delusional.  You might even challenge me to show some form of proof or evidence, that an angel had really appeared to me.  If I cannot offer any evidence, what would you call me? A lunatic and a liar?

But let’s say, y