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판 21개, 최신 판부터
HarperCollins Publishers, 2024, ISBN 9780008620417
HarperCollins Publishers, 2024, ISBN 9780008620424
Simon & Schuster Children's Publishing, 2023, ISBN 9781665938884
Simon & Schuster Children's Publishing, 2023, ISBN 9781665937443
Simon & Schuster Children's Publishing, 2014, ISBN 9781481439640
Atheneum Books for Young Readers, 2011, ISBN 9781442427662
Simon & Schuster Children's Publishing, 2009, ISBN 9781439132081
Tandem Library, 2005, Unknown Binding, ISBN 9781417720637
Atheneum, 2003, 양장(하드커버), ISBN 9780689854309
Science Fiction Book Club, 2002, 양장(하드커버), ISBN 9780739431047
Listening Library, 2002, Audio cassette, ISBN 9780807206102
Listening Library, 2002, Audio cassette, ISBN 9780807206119
Scholastic, 1998, 무선(페이퍼백), ISBN 9780590198592
Random House Children's Books, 1997, 무선(페이퍼백), ISBN 9780614289473
Arena, 1994, 무선(페이퍼백), ISBN 9783401018188
Red Fox, 1992, ISBN 9780099813507
Random House Books for Young Readers, 1990, 무선(포켓판), ISBN 9780679801139
Oxford University Press, 1990, ISBN 9780192716309
Simon Pulse, 1988, ISBN 9780689878572
Atheneum, 1988, ISBN 9780689311161
Paw Prints, 도서관 제본, ISBN 9781439529652