Kat, To make a long story somewhat short, I had a book left on my doorsteps from Amazon. At the time, I had a young lab puppy who was teething and would chew up packages. So when I ordered the book, I had put in the comments 'Leave Package Up High Due to Teething Dog'. I came home one day to find my book shred all over the yard. I called amazon. They were very nice. Supposedly, they have a one time "good faith" thing...they just mailed me another copy of the book. Didn't make me return the shreded book or offer any proof.
If you call them, I bet they will just put the cost of one book back on your credit card and tell you to keep the book.
I mean really....why would you want two copies of the same book?
Good luck!