Unknown Danger
| First published | 1969 |
|---|---|
| Publisher | Pyramid Books |
| Format | Paperback |
| Type | Novel |
| Catalog ID | X-2105 |
| Pages | 160 |
| Price | $0.60 |
Notes
Stated first printing.
Cover art not credited, incorporates a still from the TV show.
"511-02105-060" on the spine.
Contains an SFBC insert between pages 64 and 65.