The Unknown by Riley Sager (Hodder & Stoughton)

The mystery of New Avalon is a familiar flavor of isolation, a Vermont island where silence has a physical weight. Riley Sager treats his setting like a character, using the damp fog and strange symbols to dismantle his cast of actors long before the disappearances actually manifest.

The mechanics of the story hold up because they prioritize human tension over supernatural theater. The film production serves as a meta-layer, forcing characters to perform normalcy while the island systematically strips away their sanity. It works because the characters are flawed and desperate enough to believe their own lies.

The choice to alternate between the diary entries and the present provides a rhythmic pulse that keeps the pressure consistent. This stylistic choice creates a sense of inevitable decay, where the past acts as a silent, suffocating shadow over the present.

The human condition rarely changes when the lights go out. We are still the same creatures who fear the dark, just with more sophisticated tools to ignore it. A good thriller reminds us that civilization is a thin mask, one that slips the moment we realize we are alone.

For the reader who likes their suspense served with a side of nihilism, skip if you need the comfort of a moral universe.

Read Next:

• Shutter Island (Dennis Lehane): The definitive masterclass on how to dismantle a character's reality through forced isolation.
• The Sun Down Motel (Simone St. James): A sharp, cynical examination of generational trauma and why the past never stays buried.