Is it OK to leave a book wrapped in plastic wrap until I read it? I won't get around to read it for a couple of months. (seran wrap)

Don't you want to take the plastic wrap off so you can make sure there are no problems with the book?   Also, we are approaching warmer months.  I'd be afraid of moisture building up inside the plastic wrap, rendering the book unpostable in the future.  Unwrap it.  Let it breathe. 

I would unwrap it to make sure it's postable.  Sometimes they look great in the plastic. Then you open them up and there's a nasty stain or loose pages.

I used to leave mine wrapped Donald, until I opened a couple that should have been RWAP (weeks later when I had no option to request a credit return for an unpostable book).   Marking the book received without a problem eliminates the possibility of correcting a book problem later.  Best to just open them upon arrival, inspect, and mark accordingly.

Like everyone else said, I'd want to check it to make sure there's not a problem with it.

thanks for the suggestions,stupid of me for not checking the book first

I agree with Kathy, moisture builds up on the inside and could cause damage like wavy pages or a funky smell.