(The second book in the Bolos series)
An anthology of stories edited by Bill Fawcett and Keith Laumer
Standing guard as the tireless protectors of the human race, the electronic Bolos fight against alien computer viruses that infect them, repel attacks by space pirates, outmaneuver alien robot intelligences, and struggle with their own programming. Original.
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Used availability for Bill Fawcett's The Unconquerable
October 1994 : USA Mass Market Paperback