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Now vacationing with their grandfather in the South Seas, Henry, Jessie, Violet, and Benny are supposed to be on an uninhabited island. But they soon suspect someone else is there too, someone who may not want them around.

Blue Bay Mystery 2012, Oasis Audio

ISBN-13: 9781613752128

Audiobook CD

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Blue Bay Mystery 1990, Albert Whitman & Company

ISBN-13: 9780807507940

Trade paperback

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The Blue Bay Mystery 1990, Turtleback Books

ISBN-13: 9780833539274

Hardcover

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Blue Bay Mystery 1961, Albert Whitman & Company

ISBN-13: 9780807507933

Hardcover

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