"The Worst Witch" is a children's book series written by Jill Murphy. It follows the adventures of Mildred Hubble, a clumsy and kind-hearted young witch who attends Miss Cackle's Academy for Witches. Despite her frequent mishaps and magical blunders, Mildred's determination and bravery often help her overcome challenges. The series began with the first book published in 1974 and has since expanded to include several sequels and adaptations. The stories emphasize themes of friendship, acceptance, and the importance of being true to oneself, making them relatable for young readers.