Get Free Shipping on orders over $79
The Unknown : A totally gripping, unputdownable and heart-pounding thriller - Riley Sager

The Unknown

A totally gripping, unputdownable and heart-pounding thriller

By: Riley Sager

Paperback | 11 August 2026 | Edition Number 1

At a Glance

Paperback


RRP $34.99

$28.75

18%OFF

or 4 interest-free payments of $7.19 with

Available: 11th August 2026

Preorder. Will ship when available.

In 1926, five women disappeared from a remote island in Vermont. Now, one hundred years later, it's happening again.

Struggling actress Marin Keane is shocked when she lands a role in a major motion picture about the unsolved mystery of New Avalon, an island on sprawling Lake Faraday in Vermont. She's even more surprised when she learns that the role requires a weeklong research trip to that very spot.

Because New Avalon isn't your ordinary island. A century ago, it was a commune for spiritual mediums-until they all vanished in 1926. The only trace of them was five dresses hanging from the branches of an old oak tree in the middle of the island, one for each missing woman. Some locals say they simply left. Others think they were murdered. But the prevailing opinion, thanks to a diary left behind by one of the vanished, a young woman named Daisy Rue, is that a seance gone wrong conjured something supernatural that took them all one by one.

Not long after arriving, Marin and her castmates, including legendary actress Violet Wright and white-hot director Ronan Peters, begin to realize all is not right with New Avalon. They hear strange noises in the night and notice mysterious symbols left behind by the island's previous occupants. And after a sudden health emergency leaves Marin, Ronan, and the other actors stranded on the island, the disappearances begin again.

Is it the work of someone trying to derail the movie? Or is the island's alleged supernatural past catching up with the present? As fear and suspicion mount, Marin turns to Daisy's diary, hoping it holds the key to figuring out what really happened to the women of New Avalon-and how to keep the island's terrible history from repeating itself.

About the Author

Riley Sager is the New York Times bestselling author of ten novels, most recently With a Vengeance, Middle of the Night and The Only One Left.

His novels have been published in 40 countries, with more than 4 million copies sold worldwide. The Unknown is his latest book.

A native of Pennsylvania, he now lives in Princeton, New Jersey.

More in Thrillers & Suspense

The Crossroads : Joe Pickett - C.J. Box

RRP $32.99

$26.99

18%
OFF
It Could Have Been Her - Lisa Jewell

RRP $34.99

$17.49

50%
OFF
Clive Cussler's Cold Fire - Graham Brown

RRP $34.99

$19.99

43%
OFF
The Secret of Secrets : (Robert Langdon Book 6) - Dan Brown

RRP $24.99

$16.99

32%
OFF
The Hallmarked Man : Cormoran Strike Book 8 - Robert Galbraith

RRP $24.99

$21.75

13%
OFF
Red Lake : Harper Quinn Book 1 - Jason Summers

RRP $34.99

$19.99

43%
OFF
Every Time She Wakes - Petronella McGovern

RRP $34.99

$28.75

18%
OFF
Boring Asian Female - Canwen Xu

RRP $32.99

$19.99

39%
OFF
I Will Find You - Harlan Coben

RRP $24.99

$21.75

13%
OFF
Worry Doll - Laura McPhee-Browne

Paperback

RRP $29.99

$24.99

17%
OFF
Hero : The gripping new thriller from the author of OUTBACK - Patricia Wolf
Tyrant - Conn Iggulden

Paperback

RRP $24.99

$21.75

13%
OFF
Find Me - Holly Craig

Paperback

RRP $34.99

$28.75

18%
OFF
The Detective : A Detective Sam Speedman Thriller - Matthew Reilly

RRP $34.99

$28.75

18%
OFF
Where Truth Ends : Twisty, addictive Aussie psychological thriller - Mark Smith
Brain Damage - Freida McFadden

Paperback

RRP $34.99

$25.75

26%
OFF