The Royal Book of Oz In which the Scarecrow goes to search for his family tree and discovers that he is the Long Lost Emperor of the Silver Island

"The Royal Book of Oz" by Ruth Plumly Thompson is a fantastical children's story where the Scarecrow sets out to find his family history, only to learn that he is the missing ruler of the Silver Islands. Joined by his loyal friends, including Dorothy and the Cowardly Lion, the Scarecrow begins his quest after Professor Wogglebug suggests researching everyone's family history. This suggestion makes the Scarecrow wonder about his own background. Upset by the possibility of having no family, the Scarecrow decides to trace back to his beginnings at the Munchkin farm. Throughout his journey, he navigates through Oz, encountering peculiar creatures and landscapes as he explores his sense of self, mixing humor and friendships with the magic of Oz.