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Robert Silverberg

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The Time Hoppers is a science fiction novel by American writer Robert Silverberg, first published by Doubleday in 1967. The plot concerns Joe Quellen, a 25th-century bureaucrat charged with investigating "hoppers", travelers from the future whose presence in the past has been documented for hundreds of years, and his …

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The World Inside is a science fiction novel written by Robert Silverberg and published in 1971. The novel's first chapter was first published in 1970 as a short story titled "A Happy Day in 2381". The World Inside was nominated for a Hugo Award in 1972. On March 2, 2010, Orb Books published this title as a trade …