Книга «The Magicians of Caprona». Автор - Діана Вінн Джонс

The Dukedom of Caprona is a place where music is enchantment and spells are as slippery as spaghetti. The magical business is run by two families the Montanas and the Petrocchis and they are deadly rivals. So when all the spells start going wrong, they naturally blame each other. Chrestomanci suspects an evil enchanter; others say it is a White Devil. Or maybe a different kind of magic is needed to save Caprona