Cover of The Unknown by Riley Sager

The Unknown Book Club Questions

10 discussion questions for The Unknown by Riley Sager.

October 18, 2026

Spoiler warning: some questions touch on how the book ends. Best read after you've finished it.

Discussion questions

  1. What were your first impressions of Marin Keane, and how did they change as the story progressed?
  2. How did the setting of New Avalon contribute to the atmosphere of mystery and suspense in the book?
  3. What role did Daisy Rue's diary play in shaping the characters' perceptions of the island's past?
  4. Do you think Marin was right to accept the role in the movie, given her initial reservations about the island's history?
  5. How did the relationships between the cast members evolve during their time on the island, particularly between Marin and Violet Wright?
  6. What did you think of the symbols found on the island, and how did they influence the group's actions and decisions?
  7. Was Ronan Peters justified in his decisions as a director and leader once the cast became stranded on the island?
  8. How did the narrative structure, with its timelines between 1926 and the present day, affect your understanding of the story?
  9. Do you believe the island's supernatural events were real, or were they a result of human intervention and fear?
  10. What were your thoughts on the book's ending, and how did it resolve or leave open the mystery of New Avalon?

These questions were drafted with AI help for book clubs using Lapwing.

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