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173 pages • first pub 1931 (editions)
ISBN/UID: 0448089106
Format: Hardcover
Language: English
Publisher: Grosset & Dunlap
Publication date: 01 January 1967
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
173 pages • first pub 1931 (editions)
ISBN/UID: 0448089106
Format: Hardcover
Language: English
Publisher: Grosset & Dunlap
Publication date: 01 January 1967
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