Hardcover, 188 pages
German language
Published Jan. 1, 1997 by Bertelsmann, München.
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George is not pleased when Berta, a spoilt American girl, turns up at Kirrin Cottage in the middle of the night -- dressed in disguise! But George hasn't got time to be jealous. Berta is in hiding from kidnappers, and she needs help. The Famous Five are the only ones who can protect her -- but will they risk danger to themselves to help out a virtual stranger?