Where do deleted books go?

I was too fast typing in the search and the next thing I saw was "you deleted a book 'undo'"? I didn't get to it fast enough, and now I don't know what was deleted because there isn't anything in my recycle bin. I suspect it was directly deleted, but now I am stuck not knowing what was deleted.

Any suggestions on what to do?

UPDATE: Found the book - I synced my Goodreads Shelves and found the one that wasn't in the library.