Catship reviewed Hat Full of Sky by Terry Pratchett
Oooh
This one is really nice. It's exciting, and it has a lot of Granny Weatherwax, next to other super cool characters, and there's even some musing on what it means to be a witch that is not only super cool, but also has Esme get sentimental! Love it.
There is plural stuff again, both the more explicit kind and more indications that being a witch means not being too singlet in general, and being comfortable with that.