This is a very creative idea, I like the idea of the book as a canvas for creativity. I have a couple of exhibition books that have that look and feel of being a piece of art in their own right- the material and finish of a cover play a huge part in this. Plus I am a sucker for a bit of embossing on a book cover. These things all bump up the price though.

Do I judge books by their covers? Guilty as charged.

I'm sure the content of your book will also be fantastic too!