I called and asked if they could just replace the cover (the book itself is fine), but that's not possible. They'll send a postpaid label for me to return the book, and send a replacement book. Since I don't have a printer (yeah, yeah, I know) and was just at the Times today, it'll be at least a week before I can print the label. This runs into the possibility that the return will get there after 30 days. They said they couldn't send a physical label.
They agreed to waive the date requirement, and also said they'd give me a $10 promotional credit. "That would be very lovely," I replied.
So I hope this all works out. Whose brilliant idea was it to enclose gluey ads that ruin the merchandise? Yeesh. If the replacement comes with the same ad, I give up.