Did You Know It Doesn't Always Pay to Expedite?

Did you know it doesn't always pay to expedite?

I recently ordered three books from Half.com. The first book my son just found out he needed in a class, so I paid a few extra dollars to expedite the shipping. A few days later I ordered two more books for next semester's classes. I did not expedite these two books. I have since received both of the latter books, one being received only three days after ordering. I have yet to receive the book I paid to have expedited, though I did get word that it is being shipped out!