While accompanying Pete's inventor grandfather to New York where the old man plans to sell his new invention, the Three Investigators find themselves in the middle of a dangerous spy case.
- ISBN10 0394966090
- ISBN13 9780394966090
- Publish Date 12 September 1984
- Publish Status Remaindered
- Out of Print 15 June 2011
- Publish Country US
- Imprint Random House Books for Young Readers
- Format Hardcover
- Pages 182
- Language English