Michael was quite young when he discovered that some of his playmates bled if they cut themselves, and some didn't. For a long time he didn't think about it. Nor did it seem strange to see Zeppelins being attacked by jet fighters above London's force field, or glimpse Queen Victoria walking with Winston Churchill in the Mall. Not at first.
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Used availability for Edmund Cooper's The Overman Culture
November 1971 : UK Hardback
1976 : USA Mass Market Paperback
July 1979 : UK Paperback
January 1973 : USA Paperback
1972 : USA Mass Market Paperback
September 2011 : USA, Canada Kindle edition
September 2011 : UK Kindle edition
Title: The Overman Culture
Author(s): Edmund Cooper
Availability: Amazon UK