Discovering that their new gymnastics teacher likes cats, brooms, strange drinks from the health bar, and funny rhymes, the kids at Bailey School become convinced that Miss Brewbaker is really a witch.

The Hardy boys' investigation of a museum robbery in England arouses the anger of a coven of black witches.

A young boy and his Norwegian grandmother, who is an expert on witches, together foil a witches' plot to destroy the world's children by turning them into mice.

The Southern Kingdom is in the grip of Emperor Seven and his war on both magic, books, and learning; even worse, a malignant darkness is rising and threatening everybody, including Brystal Evergreen, who has gathered allies among the fairies and other magical creatures to confront the threat, but she is also aware that the days of her life are slipping away, and if she does not find the Book of Sorcery in a few weeks she will die.

When the government of the magic world and authorities at Hogwarts School of Witchcraft and Wizardry refuse to believe in the growing threat of a freshly revived Lord Voldemort, fifteen-year-old Harry Potter finds support from his loyal friends in facing the evil wizard and other new terrors.