The Secret of the Caves
| Publisher | Grosset & Dunlap |
| Series | Hardy Boys Mystery Stories |
| Format | Hardback |
| Language | English |
| Location | New York |
| Copyright | 1929 |
| Pages / Font | 210 pages |
| Series Number | 7 |
| Notes | Brown Cover |
Added by jlkrien
| Publisher | Grosset & Dunlap |
| Series | Hardy Boys Mystery Stories |
| Format | Hardback |
| Language | English |
| Location | New York |
| Copyright | 1929 |
| Pages / Font | 210 pages |
| Series Number | 7 |
| Notes | Brown Cover |