I marked the wrong book as received in pending today and can't figure out how (if possible) to "un-receive" it so that it is back on my pending list. Thanks for any help.
this is one of those things that is irreversible on Bookmooch. Chances are, the book will come and you can forget all about this case of clicking the wrong option. If the book never comes, chalk it up to a lesson learned about double-checking your clickage.
Just email the sender and explain what happened. Then email them again when it does turn up. It's an easy mistake to make, especially if you get a bunch of books at once.