The Hidden Staircase
| Publisher | Grosset & Dunlap |
| Series | Nancy Drew Mystery Stories |
| Format | Hardback |
| Language | English |
| Location | New York |
| Copyright | 1959 |
| Pages / Font | 182 pages |
| Series Number | 2 |
| Other | 9502 |
| Notes | Yellow Cover |
Added by jlkrien
| Publisher | Grosset & Dunlap |
| Series | Nancy Drew Mystery Stories |
| Format | Hardback |
| Language | English |
| Location | New York |
| Copyright | 1959 |
| Pages / Font | 182 pages |
| Series Number | 2 |
| Other | 9502 |
| Notes | Yellow Cover |