That wasn't the deal, you said "And I found a unicorn, but I killed it and threw it in the sea." I challenged you to write about it so I can read it. What are you afraid of?
That's all. You made a claim so I said I will read your evidence and you can read my evidence. We can then both make up our minds as to what we believe.
And about the Qur'an. I've been friends with a few muslims, they shared their belief with me, and I gave my views. I like a civil exchange of ideas. Telling me that I need to go read the Qur'an is like telling me to go look for my car keys in the closet when I already have them in my hand. I have already found the Truth.
Write your unicorn book, I'll read it.