ISBN-13: 9781425904579 / Angielski / Miękka / 2006 / 92 str.
This is the story of how a brother and sister meet a boggart (a mythical being) and his friends, and gain their trust by dealing with the boggart catcher who is threatening their existence. Then, with the help of Granddad and his mate Arnold - a computer wizard - they rescue the boggart chief who has been kidnapped by a band of rival boggarts.