Second Variety is a science-fiction novelette written by Philip K. Dick and published in 1953.

After a terrible war between the United Nations and the Soviet Union, survivors live in a wasteland.

There, soldiers discover self replicating robots initially conceived to destroy the Soviet agents.

But the robots now seem to target everyone.

Can the soldiers survive this terrible and new threat ?

Second Variety was adapted into the 1995 movie Screamers.
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