I promise I looked this time for an answer in the other threads and I saw nothing like it. So here goes.

My kids recieve books from the Dolly Parton kids club and they always come wrapped in clear plastic, and I have been wondering this since I joined.
If I was to wrap a book in clear plastic, and no paper outside, would it still go? In the beginning I was wrapping all my books in a durable plastic, and then the book wrapper, but I have recently started using the plastic wrap on all of my books, and of course I still use paper outside..
I did see someone comment on another thread that someone had used a ziplock bag and taped the label to that. But that still doesn't answer wether or not it is really "allowed"   TIA :)
~Jenn

It's "allowed", but not necessarily recommended.

The sender of any package has the responsibility to package their item in whatever way is necessary to protect that item from damage from normal processing thru the PO.  If you only use clear plastic to wrap your book in, you run the risk of the To/From labels being separated during processing.  Also, it could be potentially a problem for the receiver.  What if the book was supposed to be a gift for another family member?  

I've gotten a couple of books this way.  I personally don't like it because I read a lot of Erotica - all types.  I don't mind people knowing what I am reading, but my Mailman (who is a friend) doesn't necessarily want to look at a cover of a book with 2 guys hugging, or three or more folks in even slightly compromising positions.  I have book covers that I use for the "racier" covers when I take them out of the house.

You can, but all of the books I have received wrapped only in plastic like Ziploc were torn by postal machinery. If they had gotten wet they would have been damaged and I would have asked for the credit back since I would consider the wrapping method inadequate and the reason it was damaged. The machines these packages go through have a lot of things that poke and grab. A company like that is probably using an industrial strength packaging product, not something we have access to at home.

I certainly wasn't thinking of sending out all the books requested on here from me LOL I don't have that much plastic by any means. I thought it would be funny to send a gift (they know they are getting) to someone in clear packaging. I just thought it might fall in line with the advertising thing if I did send a book this way..

I know I asked about books- but that was one of the only examples I could use, other than one of those clear acrylic boxes.

Actually, we've seen posts on this subject.  IIRC some other countries require certain types of mail to be send in clear plastic mailers (solves inspection issues).  A few PBS members have received books mailed in clear plastic, but it's really sketch for most household weights of plastic.  So, if your plastic is durable enough you could certainly enclose the invoice, wrap it up, add the label, and see what happens. 

We have a heavy frosted plastic (from ordering a new auto hood) that would be heavy enough (much heavier than zip-lock).  So far I've only recylced it for underwrap tho.  DH receives several trade magazines every month, they come in clear plastic sleeves.  I recycle those as underwrap too!

I've received books wrapped in clear plastic before--just wrapped in plastic wrap, then clear taped all over.  Made it here just fine, though I think the layer of tape makes the difference!  Tape is much tougher than plastic wrap or a ziploc bag on its own.