I mailed two packages at the same time ; a box of 4 books to Japan (APO) and a single book to WI. The box arrived in Japan ,but the single book has not gotten to its destination. Media Mail is cheap and unpredictable , kinda like a used car. LOL

Wisconsin is a bit funny, too, for media mail.  There was a link not too long ago talking about the problems they're having in that state concerning media mail.  Seems that the post office over there had a problem with a seller who paid media rate but was actually sending their product (other than books).   Now the post office in Wisconsin likes to open up media mail and double check.  Doesn't make sense to me either.  Might not be what happened here but I've learned to get DC confirmation if I send any books to Wisconsin. 

I hope your book arrives soon.

Oh no's not Wisconsin lol!

"...Media Mail is cheap and unpredictable , kinda like a used car..."  good observation Fara 

Wisconsin is testing some program where they inspect a significantly higher percentage of media mail than other areas. This often results in slower transit time.