The Sleepwalker
An emergency call comes in the middle of the night. There is an ongoing burglary at a closed campsite in Bredäng, outside Stockholm. When the police respond to the call, there is a light on in one of the farthest caravans in the otherwise dark area, where the officers are greeted by a horrific sight. The floors, walls, and furniture are completely covered in blood. A person has been killed with an axe and brutally dismembered. In one of the rooms, a young man is sleeping on the floor with a severed arm as his pillow. He is arrested and taken into custody at Kronobergshäktet. There, he is identified as seventeen-year-old Hugo Sand, the son of a famous author.
It turns out that Hugo is suffering from a rare kind of somnambulism, which is triggered by nightmares. He is either the perpetrator or a witness but claims that he remembers nothing from that night.
When Joona Linna is asked to take on the case, he contacts his old friend Erik Marie Bark to use hypnosis in the quest to find out what happened inside the caravan. This is the start of a complicated hunt for a terrifying killer who has just entered an extremely active phase.
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Lars Kepler
Lars Kepler is the pseudonym of the Swedish writing duo Alexander and Alexandra Ahndoril, a pair whose collaborative genius has redefined Scandinavian crime fiction. Under this name, they've created one of the most thrilling and suspenseful series in modern crime literature, centered around Detective Joona Linna. Their stories are known for their relentless pace, intricate plots, and a chilling exploration of human nature’s darkest corners.
The couple began writing together after their shared passion for crime novels led them to merge their individual talents—Alexandra’s keen psychological insights and Alexander’s experience in writing thrillers. Their first book, The Hypnotist, immediately captured the attention of readers and critics alike, launching the Joona Linna series into the international spotlight. Since then, the duo has continued to captivate audiences with their ability to craft complex characters, nail-biting suspense, and twists that leave readers breathless.
Killer Instinct
Also known as Joona Linna.
In the shadowy corners of Stockholm, a new breed of killer emerges—a chilling figure whose every move seems calculated and every murder meticulously planned. Killer Instinct is a pulse-pounding crime thriller series that dives deep into the minds of both hunters and prey, where nothing is as it seems, and every twist is designed to leave you breathless.
Killer Instinct consists of ten books. The current recommended reading order for the series is provided below.

