Ok. I don’t remember to much from the second book, but here are some of the characters...
The character was originally presented as a lowly hag who had enchanted Princess Ozma in order to prevent her from ascending to the throne. Later in the series, L. Frank Baum specified that she had once conquered and ruled the Gillikin Country, as the Wicked Witch of the North, only to be deposed by the Good Witch of the North. Furthermore, Mombi had enslaved Ozma's father (King Pastoria) and grandfather, thereby removing the Royal Family of Oz, and enabling herself and the Wicked Witches of the East, West and South to conquer and divide the land between them. After forcing her to disenchant Princess Ozma, Glinda the Good Witch of the South made Mombi drink a powerful draught that removed the old witch of all her magic powers.
While still an infant, Ozma, the baby daughter of the former King Pastoria of Oz, was given to the witch Mombi of the North by the Wizard of Oz. Mombi transformed Ozma into a boy and called him "Tip" (short for Tippetarius) in order to prevent the rightful ruler of Oz from ascending to the throne. Thus, Ozma spent her entire childhood with Mombi in the form of the boy Tip, and had no memory of ever having been a girl. During this time, Tip had managed to create Jack Pumpkinhead who was brought to life by Mombi's Powder of Life. In The Marvelous Land of Oz, Glinda the Good Sorceress discovered what had happened and forced Mombi to turn Tip back into Ozma; ever since then, the Princess has possessed the Throne of Oz (although many realms within Oz remained unaware of her authority).
Jack first appeared as a main character in the second Oz book by Baum The Marvelous Land of Oz (1904). Jack's incredibly tall and skinny figure is made from tree limbs and jointed with wooden pegs. He has a large carved jack-o'-lantern for a head which is where he gets his name.
hopefully this will go through...