Perhaps all parts of Oz might not be called truly delightful, but it was surely delightful in the neighborhood of the Emerald City, where Ozma reigned. Her loving influence was felt for many miles around, but there were places in the mountains of the Gillikin Country, and the forests of the Quadling Country, and perhaps in far-away parts of the Munchkin and Winkie Countries, where the inhabitants were somewhat rude and uncivilized and had not yet come under the spell of Ozma's wise and kindly rule. Also, when Oz first became a fairyland, it harbored several witches and magicians and sorcerers and necromancers, who were scattered in various parts, but most of these had been deprived of their magic powers, and Ozma had issued a royal edict forbidding anyone in her dominions to work magic except Glinda the Good and the Wizard of Oz. Ozma herself, being a real fairy, knew a lot of magic, but she only used it to benefit her subjects.

This little explanation will help you to understand better the story you are reaching, but most of it is already known to those who are familiar with the Oz people whose adventures they have followed in other Oz books.