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187 pages • first pub 1981 (editions)
ISBN/UID: None
Format: Not specified
Language: English
Publisher: Not specified
Publication date: Not specified
Description
On a visit to Germany, the Hardy brothers investigate the theft of plans for a newly invented submarine and the mysterious disappearance of valuable coins and paintings.
Community Reviews Summary of 11 ratings
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187 pages • first pub 1981 (editions)
ISBN/UID: None
Format: Not specified
Language: English
Publisher: Not specified
Publication date: Not specified
Description
On a visit to Germany, the Hardy brothers investigate the theft of plans for a newly invented submarine and the mysterious disappearance of valuable coins and paintings.
Community Reviews Summary of 11 ratings
Average rating
Content Warnings
This book doesn't have any content warnings yet!
If you're the author of this book and want to add author-approved content warnings, please email us at [email protected] to request the content warning form.