Ralph, a short order cook, rescues a kidnapped opera singer from Big Al and his gang of nasty rats.

Mystery on the Docks 2008, Turtleback Books

ISBN-13: 9780785772477

Turtleback School & Library edition

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Mystery on the Docks 2001, Live Oak Media (NY)

ISBN-13: 9781591123224

Unknown binding

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Mystery on the Docks 1987, HarperCollins Publishers, New York, NY

ISBN-13: 9780060227029

Hardcover

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Mystery on the Docks 1984, HarperCollins Publishers, New York, NY

ISBN-13: 9780060227012

Hardcover

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Mystery on the Docks 1984, Perfection Learning

ISBN-13: 9780812414905

Hardcover

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Mystery on the Docks 1984, Turtleback Books, New York, NY

ISBN-13: 9780606018999

Turtleback School & Library edition

Hardcover

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