Pyramids. Not just because of my opinion of it, but because the events of it have so little impact on the Discworld itself. We don't hear of any of these people again, except one or two Ephebean philosophers. And while
Equal Rites was an excellent book, I felt that
Wyrd Sisters was a better introduction to Granny Weatherwax and Lancre, and Esk, even given her return in
I Shall Wear Midnight...seems to have become irrelevant to the canon in the same way Teppic did. So,
Pyramids and
Equal Rites, for varying reasons.
