I have also finished my 2 mini copper and glass books from the Art Retreat in Las Vegas last week, the Thomas Ashman class.
It was my opportunity to try a different method, since I'd had such an awful time (close to undoing me...) fitting the glass inside the copper tape. On one book, I used a transparency with a back, on another I used just a plain photo. That will work for me.
I'm really pleased with them. Now, I want to experiment with a solid sheet of copper, and add the photo on top. I'll certainly be making more, as I just love those little books.