The Hardy’s invention, Roger the Lobber, an automatic tennis ball retrieval and return unit, has been stolen from the Teen Inventor’s Club competition and then reappears without warning, transformed into a device of danger.
The Robot’s Revenge
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| Book Author | Franklin W. Dixon |
|---|---|
| Book Series | The Hardy Boys |
| ISBN | 9780785724223 |
| Language | English |
| Publisher | Turtleback |
| Publication Date | 10-15-1993 |
| Format | eBook |
| Pages | 90 |
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