The word "intact" is a funny term...
Intact as in uncut/damaged? Yes, but 1) Why? and 2)Kinda defeats the whole concept of an altered book, don't you think?

Even items as thin as stickers and vellum thicken a book, not to mention adhesive layers.

Many artists remove pages from their altered books as they progress, simply to enable them to close "flat."
If you are referring to attaching the items to the book without screws, wire, rivets, etc., there are numerous adhesives that will attach them. Your main concern at that point will regard having a sufficiently solid base (multiple pages glues together for strength) to support the copper items without tearing.

Perhaps you can explain more clearly what your concerns and problems are with your project.

~Maddy