29 - The Secret Of The Lost Tunnel
Major Edition Types
BACK
| ||||||
| Type | Years | Text | Cover | Spine | Art | Endpaper |
| A | 1950 | Original | Brown | Wrap | Gillies | Orange Gretta |
| B | 1951-58 | Tan | ||||
| C | 1958-62 | Brown multi-scene | ||||
| D | 1962-68 | PC | Blue | |||
| E | 1968-79 | revised | Nappi | White multi-scene | ||
| F | 1979-87 | Cameo | ||||
| G | 1987-Date | Flashlight PC | Blank | |||
| Major Variants
1964 - blank endpapers | ||||||