Mirror in the sky
The Creeps: Mysterious aliens locked in a death struggle with the human race, diabolically clever in their ability to mimic human devices and tactics. The war between humanity and the Creeps had lasted for years; a war so savage that human combatants were issued a daily drug ration to keep them sane. But one soldier was immune to the drug, and learned the unspeakable secret of the Creeps - and the war ..
Print Book, English, 1969
Berkley medallion edition
Berkley Pub. Corp., New York, 1969