WHERE'S MY STUFF???

At the first of October I ordered some books from Amazon dot com. One of the books I ordered was "used" and received within days of my payment clearing. However, I find it odd that this was a library book. Should I call the library listed inside the book and see if it's hot? I mean, it does have a big red "checked out" stamp on the front cover. I just find it a bit odd since it's a fairly new book. The other half of my shipment left Colorado on the 15th and went all the way to Florida and back to Colorado. There it sits. I emailed Amazon's customer service but have not received a response yet. SO. WHERE'S MY STUFF!?!?!