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      The Umbra Signal

      by David Williams
      Published
      Jul 2025
      Main Genre
      Science Fiction Sci-Fi
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      Genres & Themes

      Genres

      Speculative Fiction Suspense

      Subgenres

      Science Fiction Thriller

      Themes

      Technology Time Travel

      Characters & Occupations

      Aliens

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      Formats & Editions

      Browse the different covers, formats, and publication history for this title.

      eBook

      eBook edition cover
      eBook
      First Edition Jul 2025 Cipherlock Press ISBN13 9798994684412
      eBook edition cover
      eBook
      Jul 2025 -- Not Selected ISBN10 B0FHJCZH76
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