She wrote a lot of good books, some of which made me laugh until tears rolled down my face and my sides hurt. I think my favorites were the first three published of the more serious Dalemark Quartet, which I should reread, particularly Cart and Cwidder and The Spellcoats. And... I'm just remembering I kind of borrowed some of her genealogy from that for the Cthulhupunk game I run.
There's still a lot of her books I've not read, many of which are on our shelves, including, I think, Changeover.