Something is up at Miss Cackle's Academy for Witches: Mildred Hubble's new form teacher is really weird. Or is she? Investigating isn't easy, especially when Mildred's potions go wrong, the class know-it-all insists on being 'helpful' and her beloved cat is having a nervous breakdown... The Worst Witch Saves the Day is the fifth adventure in the much-loved Worst Witch series by Jill Murphy, in which lovable but disaster-prone Mildred Hubble is in trouble once again. 'A lovely, sparkly book' - Observer 'Millions of young readers have fallen under the spell of Jill Murphy's Worst Witch' - Sunday Express