There goes yet another one that made my life more pleasant.
66 is too early, man...
Gede: I too have never read anything written by him. I would like to.
Would someone care to suggest where to start?
kalirion: The first Discworld book is
The Color of Magic, but it's not one of the best, and not indicative of the quality that the series develops. I loved it personally, but many do not recommend it as a good way to get into the series.
Small Gods is a good stand-alone novel in the Discworld universe, with only a few cameos from established characters from earlier books.
Guards Guards is the first book of the "Night Watch" sub-series, and is very good.
Then there's always the non-Discworld
Good Omens which he co-authored with Neil Gaiman.
but my favourite book from him in general is "Dark Side of the Sun".