This, the ninth book about the Land Of Oz was his favorite and was first published on July 16th, 1915. In it Cap'n Bill and Trot journey to Oz and, with the help of the Scarecrow (and some magic he has from Glinda) overthrow the cruel King Krewl of Jinxland. Baum also experiments with such fascinating devices as berries to make you grow big or small and continued to develop themes and experiences that enthralled his young audience.