SOMEONE IN THIS CLASS IS A WITCH.

When the note, written in ordinary blue ballpoint, appears between two of the homework books Mr Crossley is marking, he is very upset. For this is Larwood House, a school for witch-orphans, where witchcraft is utterly forbidden. And yet, suddenly magic is breaking out all over the place - like measles!

The last thing anybody needs is a visit from the Divisional Inquisitor. If only Chrestomanci could come and sort out all the trouble!