When the Hardy Boys are able to locate Mr. Jefferson's stolen car, he rewards the duo with a stay on his deserted island. While there, the sleuths are asked to help solve two lingering mysteries.
| Author | Franklin W. Dixon |
| Publisher | William Collins Sons & Co. |
| Year of publication | 1973 |
| Number of pages | 160 |
| Language | English |
| Format | Paperback |
| ISBN-10 | 6912141 |
| ISBN-13 | 9780006912149 |
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