Re: I'm touched by the weirdness of this request...
Is there a suggested reading order?
Absolutely. Come up to a shelf (or two, or, in my case four) of Pratchett's books. Close your eyes. Pull a book at random. Read it. You probably won't be disappointed.
If I had to pick a personal favorite, it would probably be "Witches Abroad" or "Feet of Clay".
P.S. I really miss "Diskworld Noir". May be I should try to spin it again, in Sir Terry's honour.