The Sleepwalker
The brand new 2026 Detective Joona Linna crime thriller
Published on 26. March 2026
Book
Paperback/Softback
512 pages
978-1-83877-792-0 (ISBN)
Description
SOME NIGHTMARES YOU CAN'T WAKE UP FROM . . .
The stunning new crime thriller from the master of Scandinavian noir, Lars Kepler - available now!
An alarm sounds in the middle of the night for a burglary in progress at a winter-closed campsite in Bredaeng, outside Stockholm.
The police spot a light in one of the farthest caravans and when the officers open the door they are greeted by a horrific sight. Floors, walls and furniture are completely covered in blood. A man has been killed with an axe and brutally dismembered.
On the floor lies a young man sleeping with a severed arm as a pillow. He is arrested and taken to Kronoberg prison, identified as seventeen-year-old Hugo Sand, the son of a famous writer.
Hugo suffers from a rare sleepwalking condition that is activated by nightmares. He is either the perpetrator or a witness, but claims to remember nothing from the night.
Detective Joona Linna contacts his old friend Erik Maria Bark to use hypnosis to try to find out what happened inside the caravan. So begins the sleepless hunt for a serial killer who is only just getting started . . .
From the 17 million copy global bestseller Lars Kepler, author of The Mirror Man, comes the most anticipated crime thriller of 2025 - perfect for fans of Jo Nesbo, Ragnar Jonasson and Alex North.
Praise for Lars Kepler:
'Fast and furiously paced . . . I lapped it up' - EVENING STANDARD
'Chilling, nerve-shredding, clever, and impossibly dark' - CHRIS WHITAKER
'A rollercoaster ride of a thriller full of striking twists' - MAIL ON SUNDAY
'As dark and chilling as a Swedish winter' - GREGG HURWITZ
'A non-stop rollercoaster of suspense' - JEFFERY DEAVER
'Ferocious, visceral storytelling' - DAILY MAIL
'Thrilling' - SUNDAY TIMES
The stunning new crime thriller from the master of Scandinavian noir, Lars Kepler - available now!
An alarm sounds in the middle of the night for a burglary in progress at a winter-closed campsite in Bredaeng, outside Stockholm.
The police spot a light in one of the farthest caravans and when the officers open the door they are greeted by a horrific sight. Floors, walls and furniture are completely covered in blood. A man has been killed with an axe and brutally dismembered.
On the floor lies a young man sleeping with a severed arm as a pillow. He is arrested and taken to Kronoberg prison, identified as seventeen-year-old Hugo Sand, the son of a famous writer.
Hugo suffers from a rare sleepwalking condition that is activated by nightmares. He is either the perpetrator or a witness, but claims to remember nothing from the night.
Detective Joona Linna contacts his old friend Erik Maria Bark to use hypnosis to try to find out what happened inside the caravan. So begins the sleepless hunt for a serial killer who is only just getting started . . .
From the 17 million copy global bestseller Lars Kepler, author of The Mirror Man, comes the most anticipated crime thriller of 2025 - perfect for fans of Jo Nesbo, Ragnar Jonasson and Alex North.
Praise for Lars Kepler:
'Fast and furiously paced . . . I lapped it up' - EVENING STANDARD
'Chilling, nerve-shredding, clever, and impossibly dark' - CHRIS WHITAKER
'A rollercoaster ride of a thriller full of striking twists' - MAIL ON SUNDAY
'As dark and chilling as a Swedish winter' - GREGG HURWITZ
'A non-stop rollercoaster of suspense' - JEFFERY DEAVER
'Ferocious, visceral storytelling' - DAILY MAIL
'Thrilling' - SUNDAY TIMES
More details
Series
Language
English
Place of publication
London
United Kingdom
Dimensions
Height: 197 mm
Width: 129 mm
Thickness: 37 mm
Weight
345 gr
ISBN-13
978-1-83877-792-0 (9781838777920)
Copyright in bibliographic data and cover images is held by Nielsen Book Services Limited or by the publishers or by their respective licensors: all rights reserved.
Schweitzer Classification
Person
Lars Kepler is the pseudonym of critically acclaimed husband and wife team Alexandra Coelho Ahndoril (b. 1966) and Alexander Ahndoril (b. 1967), authors of the No. 1 internationally bestselling Joona Linna series.
With seven instalments to date, the series has sold 15 million copies in 40 languages. The Ahndorils were both established writers before they adopted the pen name Lars Kepler, and have each published several acclaimed novels.
With seven instalments to date, the series has sold 15 million copies in 40 languages. The Ahndorils were both established writers before they adopted the pen name Lars Kepler, and have each published several acclaimed novels.