"The Worst Witch" is a children's book series written by Jill Murphy. It follows the adventures of Mildred Hubble, a young witch who struggles to master her magical abilities at Miss Cackle's Academy for Witches. Despite her clumsiness and mishaps, Mildred's kind heart and determination often help her overcome challenges. The series has been adapted into various formats, including television shows and stage productions. It highlights themes of friendship, perseverance, and self-acceptance, making it a beloved story for young readers. The charming illustrations and relatable characters contribute to its enduring popularity.