The Unknown
The Unknown
A totally gripping, unputdownable and heart-pounding thriller
Hardback
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Sign in or Sign up!- Release Date: 04/08/2026
- Barcode: 9781399742122
- Genre: Fiction
- Sub-Genre: Crime Thrillers & Mystery
- Imprint: Hodder
- Publisher: Hodder & Stoughton

The Unknown
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DESCRIPTION
A totally gripping, unputdownable and heart-pounding thriller 1926
The next twisty, tension-filled, dizzying thriller from the master of suspense. You'll never guess what's coming next.
Five dresses hang from the branches of an old oak tree.
Five women from across the island disappear into the darkness.
Five pages are torn from a diary, lost for 100 years.
2026
A film crew arrive on the island to capture its legendary history. But not long into their stay, strange noises are heard. Mysterious symbols are found, left by the island's previous occupants. And then the disappearances begin again.
As panic and superstition rise, one actress must use the old diary's remains to uncover the island's terrifying secret, and prevent a dark history from repeating itself.
The brand-new, unputdownable thriller from New York Times bestselling author Riley Sager. Fans of Grady Hendrix, Freida McFadden and Alice Feeney will be hooked!
READERS LOVE RILEY SAGER:
'OH. MY. WORD. I devoured it in a single day . addictive . bold, propulsive, and full of twists. I genuinely loved it and couldn't put it down.' Goodreads reviewer, ⭐⭐⭐⭐⭐
'Wow! What a read! . I was immediately sucked in . so many twists . I literally couldn't put this book down . amazing . It deserves all the stars.' Goodreads reviewer, ⭐⭐⭐⭐⭐
'Page-turner . unpredictable . loved it . thrilling . left my head spinning.' Goodreads reviewer, ⭐⭐⭐⭐⭐
'I loved this! Riley Sager is the master of twists! This gave me big Agatha Christie vibes . tense and fast-paced.' Goodreads reviewer, ⭐⭐⭐⭐⭐
'I LOVED this book!! . heart-pounding.' Goodreads reviewer, ⭐⭐⭐⭐⭐
'I DEVOURED it!!! I loved it badddddd . In true Riley Sager fashion, you think you know what's happening and then he sends 4 more twists at you.' Goodreads reviewer, ⭐⭐⭐⭐⭐
AND SO DO YOUR FAVOURITE AUTHORS:
'A locked room thriller at its best! Nonstop suspense with twists and turns that will leave your head spinning' Freida McFadden
'Sager wields a deft hand in bringing all the elements together into a rip-roaring, tension-filled tale of greed, murder and revenge' David Baldacci
DELIVERY & RETURNS
UK Delivery:
- Free delivery on all orders of £10 or more.
- £1.49 delivery fee on orders below £10.
- UK orders are shipped via Royal Mail 2nd Class.
International Delivery:
- Flat rate delivery charges vary by country.
Dispatch and Delivery Times:
- All orders are shipped from our warehouse in Northampton, UK within 48 hours of receipt during working hours.
- UK mainland orders typically arrive within 3-5 working days via Royal Mail 2nd Class.
- International estimated delivery times:
- Europe & Channel Islands: 7 to 10 working days
- USA: 7 to 15 working days
- Rest of the World: 9 to 21 working days
View our full delivery infomation here.
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