|Unlock Forum posting with Annual Membership.|
Contact PBS using the "Contact Us" link. Send in feedback, and classify it as "Problem". Explain what happened and request to be returned to the front of the line.
Be sure to mark the book RWAP and PM the sender about the problem. Be sure to ask for your credit back if you want it returned to you. Give a deadline to respond (7 days is the time PBS requests that you give).
If you don't mark the book RWAP, you won't be able to return to the front of the line. Also, you can ask but I don't think that PBS guarantees that they will do it. Just an FYI on that. But it never hurts to ask. :)
Sorry about the damaged book.