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213 pages • first pub 1931 (view editions)
ISBN/UID: None
Format: Hardcover
Language: English
Publisher: Grosset & Dunlap
Edition Pub Date: 01 January 1931
Description
Frank and Joe race against time to retrieve a scientist's top-secret invention before thieves get their hands on it. But the young detectives soon discover that they are involved in a mystery far greater in scope than just safeguarding the inventi...
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Content Warnings
213 pages • first pub 1931 (view editions)
ISBN/UID: None
Format: Hardcover
Language: English
Publisher: Grosset & Dunlap
Edition Pub Date: 01 January 1931
Description
Frank and Joe race against time to retrieve a scientist's top-secret invention before thieves get their hands on it. But the young detectives soon discover that they are involved in a mystery far greater in scope than just safeguarding the inventi...
Community Reviews
Content Warnings