Ruth Plumly Thompson (1891-1976) was a prolific American author, best known for her continuation of L. Frank Baum's Oz series. Born in Philadelphia, Thompson became the official Royal Historian of Oz after Baum's passing, authoring 19 Oz books between 1921 and 1939. Her vibrant imagination expanded the magical world of Oz, introducing beloved characters and whimsical stories that enchanted generations of readers. Beyond Oz, Thompson contributed to various children's publications, showcasing her storytelling talents. Her passion for children's literature and dedication to the craft left an indelible mark on the fantasy genre, ensuring her legacy as a cherished creator in the world of children's books.