I had something similar happen with get this....40 books! They weren't slim volumes either. They scanned into the post office and be the time they got to the distribution center all four boxes were empty, no damage to them what so ever. Just cut tape and empty. These weren't flimsily secured either! And the post office said I was SOL because there wasn't any insurance on them. Grrr! I feel your pain, I really do!