Secret Island 2002, Thorndike Press

ISBN-13: 9780786242900

Large type / large print

Trade paperback

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Secret Island 1986, Ulverscroft Large Print Books Ltd, Leicester

ISBN-13: 9780708914908

Large Print edition

Hardcover

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Secret Island 1986, Fawcett Books

ISBN-13: 9780449209462

Mass-market paperback

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Secret Island 1986, Coronet Books, London

ISBN-13: 9780340394557

New edition

Paperback

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Secret Island 1985, G. P. Putnam's Sons, New York, NY

ISBN-13: 9780399130380

American edition

Unknown binding

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Secret Island 1985, Hodder & Stoughton Ltd, London

ISBN-13: 9780340361078

Hardcover

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