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First published in The Magazine of Fantasy and Science Fiction - March, 1959 - the story involves a number of paradoxes caused by time travel. It further develops themes explored by the author in a previous work, "By His Bootstraps", published some 18 years earlier.

  • Robert A. Heinlein
  • Published 1970 January 1st by The Heinlein Archives (first published 1970 January 1st)
  • ISBN:
  • ISBN13:
  • 13 Pages
  • 4.07 7473 ratings
  • 858 reviews

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