An impenetrable computer-operated vault has been cleaned out, and all clues point to an exclusive prep school, where Frank enrolls and Joe poses as a janitor. The school abounds with suspects, and one of them wants to get rid of the Hardy boys.

Genius Thieves 1995, Armada, London

ISBN-13: 9780006945185

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The Genius Thieves 1990, Armada, London

ISBN-13: 9780006934806

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The Genius Thieves 1988, Grey Castle Press

ISBN-13: 9780942545500

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The Genius Thieves 1987, Pocket Books

ISBN-13: 9780671680473

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The Genius Thieves 1987, Pocket Books, New York, NY

ISBN-13: 9780671630805

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