After escaping his organ-grinder master, Jacko, a monkey, embarks on a perilous journey on a sailing ship.

Jacko 1983, Macmillan Education Australia, South Yarra

ISBN-13: 9780333359204

New edition

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Jacko 1972, Houghton Mifflin Harcourt P, New York, NY

ISBN-13: 9780152394936

American edition

Unknown binding

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Jacko 1971, Macmillan Children's Books, London

ISBN-13: 9780333101148

Hardcover

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