Last week, I marked the wrong book as received. I was hoping that it would eventually show up. It was supposed to have been mailed May 18th and I still haven't gotten it. Any idea of what I should do?  I sent a PM to person but have not had a response.

I did that once. I pm'ed the sender, they told me not to worry they only had one package in a thousand go lost.  I got it, everything was fine!

If you don't hear back from the sender in a week, you could try contacting TPTB using the 'contact us' link.

I've done it on occasion, and never had a problem receiving the book. I had someone last week tell me they received a book I sent, but it had only been  3 hours since I'd taken the book to the PO and she lived several states away.  Sent her a PM, and told her I knew the PO was fast but not that fast, and to let me know when she actually does receive the book. Don't know if she will, but I did let her know that she'd hit the wrong button. Pat

Thanks for advice. I did get a response and she said she did mail it and that I should have received it by now.  Guess I will just have to hope that it eventually shows up.