Oddly enough, contains very little Ozma and is mostly about Dorothy’s adventures in the Land of Ev. Still, this is one of my favorites, mostly because of clever Billina. She’s opinionated and smart and she doesn’t take any sort of nonsense from anyone. Again with the mistaken identity, Billina was originally thought to be a rooster until she turned out to be a hen.
I also love the gnome king. The jolly fellow who seems pleasant and turns out to be quite evil. I think, in this book at least, he's one of the better villans of Oz.