When their detective father asks them to play burglar in order to protect a client's valuable invention from thieves, the Hardy boys find themselves involved in a large and dangerous conspiracy.
- ISBN10 1557092680
- ISBN13 9781557092687
- Publish Date 1 April 2000 (first published 1 May 1931)
- Publish Status Out of Stock
- Imprint Applewood Books
- Format Hardcover
- Pages 228
- Language English