<p>Well I always associate couriers with the mailing services that deliver in a short time frame eg FedEx, UPS, DHL etc. (I may be mistaken). Whereas regular mail is, well, the regular mail. If your postman dropped it off I’ll assume it’s regular mail which will mean I’ll be waiting an eternity to get my books. I just hope it doesn’t get lost! I had a package from Queens University that i didn’t know about and it got lost in the mail… it was sent in November 2008 but I didn’t receive until March 2009… <em>sigh</em> <em>crossing fingers that I’ll get my books soon</em></p>