The Unknown

Some islands keep their disappearances the way a house keeps a smell: faintly, permanently, no matter how many windows you open. This one swallowed five mediums in 1926 and never gave a reason. A century later, a film crew shows up to make a movie about it, which is the kind of decision that only ever ends one way in a Riley Sager novel.

What it's about

An actress arrives on a remote, fog-wrapped island to shoot a film about the five spiritualists who vanished there in 1926. The island still has its seance rooms, its long shadows, its particular way of making a modern crew feel like trespassers. Then the past starts to rhyme with the present. Small things at first, the sort you could explain if you wanted to, until the cameras begin catching more than the script asks for. Sager keeps the frame tight: one woman, one location, one history that refuses to stay finished. The premise does the heavy lifting, which is the point. Everything here is atmosphere and dread before anything ever announces itself.

Why everyone's talking about it

Sager has built a reliable brand out of a single move: take a familiar horror setup (the final girl, the haunted house, the lonely lighthouse) and pull the rug at least twice before the end. His readers show up for the twist and stay for the mood, and "actress on a cursed island" is squarely in his lane. This one leans harder into the supernatural than some of his earlier thrillers, which is the draw for anyone who wants their mystery with real fog in it, and the caution flag for readers who prefer their scares fully explained by the last page.

It hits for the person who reads with the lights on and secretly likes it. It hits for anyone who loved the slow, closed-set dread of a good haunted-location story. Skip it if you find Sager's late-book reversals more exhausting than delightful, or if you want your ghosts to stay metaphorical. This one commits to the bit.

The verdict, for now

If you already trust Sager to walk you into a locked room and rattle the door, this is an easy yes, especially heading into a foggy evening when you have nowhere to be. If you have never tried him, this is a perfectly good place to start, though be warned that islands in his books rarely let anyone leave clean. Read it before someone inevitably options it and the seance rooms get a lighting budget.