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175 pages • first pub 1981 (editions)
ISBN/UID: 9780671624774
Format: Paperback
Language: English
Publisher: Minstrel
Publication date: Not specified
fiction
middle grade
mystery
adventurous
lighthearted
mysterious
slow-paced
Description
Vacationing in Germany, Frank and Joe Hardy become intrigued by the sabotage of an inventor's miniature sub and the theft of five priceless medieval paintings.
Community Reviews
Content Warnings
175 pages • first pub 1981 (editions)
ISBN/UID: 9780671624774
Format: Paperback
Language: English
Publisher: Minstrel
Publication date: Not specified
fiction
middle grade
mystery
adventurous
lighthearted
mysterious
slow-paced
Description
Vacationing in Germany, Frank and Joe Hardy become intrigued by the sabotage of an inventor's miniature sub and the theft of five priceless medieval paintings.
Community Reviews
Content Warnings