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      Proof of Concept

      by Kristine Kathryn Rusch
      Published
      Oct 2025
      Main Genre
      Science Fiction Sci-Fi
      Pages
      118
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      About This Book

      "…a gripping, well-paced plot and a victim backstory that quickly ups the emotional stakes." â€"Tar Vol

      "…a nice twist on a locked-room mystery that makes good use of its setting to provide a ticking clock element." â€"Locus Magazine

      36 hours until the interstellar cruise ship Radost arrives at the First Disembarkation Point.

      36 hours before all passengers can leave without consequence.

      36 hours for Orli, the ship's detective, to discover the killer of crewman Riley Kalb.

      A stunning thriller from one of the best science fiction writers in the business.

      Genres & Themes

      Genres

      Speculative Fiction Suspense

      Subgenres

      Mystery Science Fiction Thriller

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      Formats & Editions

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

      Paperback

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      Trade Paperback
      First Edition Oct 2025 Wmg Publishing, Inc. ISBN 1561468622
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      Hardcover

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      Hardcover
      Oct 2025 Wmg Publishing, Inc. ISBN 1561468630
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      eBook

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      eBook
      WMG Publishing
      eBook edition cover
      eBook
      Oct 2025 WMG Publishing, Inc. ISBN 1561469424
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      eBook edition cover
      eBook
      Oct 2025 -- Not Selected ISBN B0FYSPJ5Y2
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