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The Black Cloud Fred Hoyle The Black Cloud Fred Hoyle · 1957 First published 42 years earlier Save Continue from here
Downward to the Earth Robert Silverberg Downward to the Earth Robert Silverberg · 1976 First published 23 years earlier Save Continue from here
2061: Odyssey Three Arthur C. Clarke 2061: Odyssey Three Arthur C. Clarke · 1988 First published 11 years earlier Save Continue from here
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