The Secret of the Old Mill
| Publisher | Grosset & Dunlap |
| Series | The Hardy Boys |
| Publisher Series | Hardy Boys Mystery Stories |
| Format | Hardback |
| Language | English |
| Location | New York |
| Copyright | 1962 |
| Pages / Font | 174 pages |
| Series Number | 3 |
| Other | 8903 |
| Notes | Blue Cover |
Added by jlkrien · Last edited by miketaylor81