Shrouded in eternal gloom by its own thick atmosphere, Tenebra was a hostile planet: a place of crushing gravity, 370-degree temperatures, a constantly shifting crust and giant drifting raindrops. Uncompromising - yet there was life, intelligent life on Tenebra. For more than twenty years, Earth scientists had studied the natives from an orbiting laboratory... and had even found a way to train and educate a few of them.
- ISBN10 0345291689
- ISBN13 9780345291684
- Publish Date 12 December 1980 (first published May 1966)
- Publish Status Active
- Imprint Del Rey Books
- Format Paperback (US Mass Market)
- Language English