The Marvelous Land of Oz

The Marvelous Land of Oz by L. Frank Baum is the second book of fourteen in the original "Oz" series written by Baum. In it, a little boy, Tip, escapes from his evil guardian, the witch Mombi, with the help of a walking wooden figure with a jack-o'-lantern head named Jack Pumpkinhead (brought to life with the magic Powder of Life Tip stole from Mombi), as well as a living Sawhorse (created from the same powder). Tip ends up on an adventure with the Scarecrow and Tin Woodman. It later transpires that Tip is actually Princess Ozma, the rightful ruler of Oz, who was transformed by the evil Mombi.