The Worst Witch
"The Worst Witch" () was first published in 1974 by Allison & Busby, who took the book on after it had been turned down by three other publishers.
List of minor The Worst Witch characters
Agatha Cackle is Miss Cackle's rebellious identical twin sister. She first appears in the first book where Mildred spots her and her warlike coven plotting to turn the whole academy into frogs, only to be discovered by Mildred as they were preparing their spells the day of their attack; they had planned to attack after the Halloween display, when the school normally slept in until noon, but Mildred was running away from the school in a panic after she unintentionally caused an accident during a broomstick display. Lacking any other ideas or time to stop them, Mildred turned Agatha and the coven into snails and puts them in the boxes meant for the frog-pupils and frog-teachers, subsequently taking them up to the academy to show to Miss Cackle. Having convinced her teachers of her honesty, Mildred was absolved of any punishment for the broomstick incident, Agatha and her coven being turned back into humans only after conceding that they had been defeated according to the Witches' Code. Agatha reappears in the fifth book "The Worst Witch Saves the Day" where she comes into the school disguised as a new teacher Miss Granite with a high-pitched squeaky voice and a large mop of ginger curls and a frivolous appearance. She is later found out by Mildred when Mildred comes to collect Tabby from her. Luckily, Mildred and co. turn Agatha and her coven into snails themselves.