Remember Captain Sullenberger, who successfully crashed that plane into the Hudson a while back? Well, it turns out he had four library books with him. And he called his local library to apologize for not returning them.
Under the circumstances, they waived the fines. But it also turns out that, after they fish your luggage out of the river, it gets sent to a reclamation company, which does the best it can and sends it back to you. So a few months later, Captain Sullenberger got four dried-out library books back. And they were still readable. Not lendable, but readable.
So he returned them. And the library has them on display now. I’d say they got more than the value of the fines out of that.