I just got a package and there was a tear in the bottom and the book slid out. Was there an address or phone number to call to have the post office do a search for the book?
I think it's 1-800-ASK-USPS
there is a recovery center for found items you need to contact your Usps and find out where it is in your city. Happened to me I never got my lost book.
Thank you for your patience