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판 12개, 최신 판부터
Chivers Audio Books, 2002, Audio CD, ISBN 9780754065135
Puffin Books, 2000, Unknown Binding, ISBN 9780141307626
Chivers Audio Books, 1996, Audio cassette, ISBN 9780745173443
Puffin, 1995, ISBN 9780140375770
Puffin Books, 1995, ISBN 9780140370997
Puffin, 1993, ISBN 9780140349108
Formac, 1992, Audio cassette, ISBN 9780642129499
Puffin Books, 1992, ISBN 9780140362435
Formac, 1992, 무선(페이퍼백), ISBN 9780887802102
Viking Juvenile, 1991, 양장(하드커버), ISBN 9780670841752
Puffin Books, 1986, ISBN 9780140319651
Puffin Book, 1985, ISBN 9780140376272