The feminist horror thriller Reykjavík is built on blood and friendship.

Dead Weight by Hildur Knútsdóttir: Icelandic Horror at Its Most Ferocious

Dead Weight by Hildur Knútsdóttir arrives from Tor Nightfire on May 26, 2026, and it is the kind of feminist horror fiction that gets under your skin and stays there. Translated by Mary Robinette Kowal, this 160-page Icelandic horror novella follows Unnur, a thirty-three-year-old business analyst in Reykjavík whose lonely life is upended by a stray black cat and the young woman who owns it. What follows is a psychological horror thriller built from pressure, female friendship, and the question of what women do when everything they have been tolerating finally becomes intolerable.

It starts with a confession. The very first line of Dead Weight tells you that Unnur, Knútsdóttir’s thirty-three-year-old protagonist, has spent a long time thinking about how to dispose of a dead body. And then the narrative steps back in time. You know where you are going. You just don’t know when the road turns.

This is a structural decision of real confidence. The prologue, yes it has one of those 😛, functions like a bruise you can feel before you understand what hit you. It colours everything that follows, every ordinary detail of Unnur’s Reykjavík life, from her commute along Borgartún in the financial district to her lonely fridge and her half-relationship with a man who can’t quite prioritise her. The dread is baked in from sentence one, and Knútsdóttir has the discipline to let it accumulate slowly, almost domestically, before it ruptures.

The atmosphere is tight, close, precise. The horror here is not supernatural; it belongs to the world of locked apartment doors and men who show up when they aren’t wanted and friendships that form too fast and feel too necessary. By the time Unnur meets Ásta, the young woman who claims the stray black cat, Io, as her own, you are already attuned to every small vibration in the prose.

The pacing is relentless without being rushed. In its short page count, Knútsdóttir achieves what a great deal of full-length novels spend twice the space trying to do: she makes you care so deeply about two women that the violence, when it arrives, lands somewhere behind the sternum.

Knútsdóttir writes in a register that is at once plainspoken and immaculately controlled. Her sentences don’t reach for atmosphere; they carry it by accident. The first-person narration from Unnur’s perspective is locked-room tight, all surface practicality and suppressed pressure. Unnur notices things, catalogues them, and applies a cost-benefit logic to nearly every decision in her life. She is a business analyst, and Knútsdóttir commits to this fully, letting her character think in terms of incremental trade-offs even as the world around her slides toward chaos.

What Knútsdóttir does particularly well is calibrate interiority. We get Unnur’s thoughts on everything: the stiff handles of paper grocery bags cutting into her palms, the way she practises facial expressions in the mirror before difficult conversations, the specific loneliness of waiting for a call from a man who puts you second. The accumulation of these details does more psychological work than any explicit statement could. By the time the violence arrives, you understand exactly what Unnur has been carrying. You understand, too, why she doesn’t put it down.

Dialogue is spare and purposeful. When Ásta begins visiting the apartment to check on Io and her new kitten, the exchanges between the two women have the halting quality of real friendship forming, two people who both need something they can’t quite name yet. Knútsdóttir avoids the sentimentality that would make this easy. The friendship is built in gaps and returns, in small acts and cautious revelations.

What is Dead Weight actually about? On the surface, it is a story about a black cat and an unlikely friendship. Underneath that, it is about what women carry and what they now refuse to carry.

The title earns its place. Both Unnur and Ásta are, in different ways, defined by the weight of things they have not yet shed: a boyfriend who makes Unnur feel peripheral in her own life, a partner, Ragnar, who is abusive and controlling toward Ásta. The friendship between the two women is, in part, the story of two people recognising in each other a shared fatigue with these arrangements. What makes Knútsdóttir’s treatment of this genuinely compelling is that she doesn’t frame shedding dead weight as a simple liberation. The costs are real. The choices are dark. The catharsis is complicated.

Domestic violence is at the centre of the story. Knútsdóttir handles it without sensationalism or explicitness; the horror is in the facts, not the gore. Ragnar’s behaviour is rendered through its effects on Ásta, through the way she flinches at certain subjects, through the reason Io the cat prefers not to return home to him. The book trusts the reader to understand what is happening without spelling it out, which is its own kind of precision.

The Icelandic setting does quiet, steady work throughout. Reykjavík is a small city where anonymity is thin and the nights in certain seasons are endless. The geography gives the story a peculiar claustrophobia that is not oppressive but rather intimate, the sense that events here will matter to everyone, that the city itself is a kind of witness.

The Night Guest, Knútsdóttir’s first novel, translated into English in 2024, follows Iðunn, a woman whose chronic fatigue goes undiagnosed and dismissed by her doctors. The horror of that book is rooted in medical gaslighting, in the experience of a woman’s body behaving beyond her control while everyone around her tells her nothing is wrong. It is a psychological horror anchored to a very real cultural problem.

Dead Weight is a clear development from that foundation. Where The Night Guest located its dread in the failure of institutions to listen to women, Dead Weight shifts the weight inward. It is less about systems that dismiss women and more about the women themselves making choices, violent and difficult ones, to reclaim their own lives. The shift from a character defined by what happens to her to one defined by what she decides to do is significant. Unnur is not a victim waiting to be rescued. She is, from the first line, already the person who acts.

Both books share an architectural instinct: the compressed space, the single perspective sealed tight, the horror that builds through accumulation rather than incident. Both are novellas, and both use brevity as a weapon, giving you just enough room to breathe before they close the walls in. Knútsdóttir is becoming a writer who understands that in a short book every sentence is structural.

Its closest genre neighbours, in terms of both sensibility and darkness of intent, are Natsuo Kirino’s Out and Oyinkan Braithwaite’s My Sister, the Serial Killer. Both of those books also centre female characters making extreme choices in response to male violence, both blend horror and crime with a distinct interest in female interiority, and both refuse to deliver the neat moral resolution the genre convention would demand.

What separates Dead Weight from its neighbours is the quality of its compression and its emotional honesty. Kirino’s Out is a sprawling, exhausting immersion. Braithwaite’s novel is fleet and darkly comic. Knútsdóttir occupies a third space: intensely personal, structurally elegant, and genuinely moved by its characters. There is warmth here that neither of the other books quite allows.

It is Icelandic horror, too, and there is something in that particular cultural tradition, the sagas, the stark landscape, the long winter dark, that gives the violence here a different register. It doesn’t feel imported or derivative. It feels like it grew in the long dark nights.

Nothing tests a friendship like blood on your hands. Knútsdóttir wrote that line as a tagline and it is more accurate than it appears. This is a book about what women are asked to carry, and what happens when one of them finally decides she’s done carrying it alone. The way you sit with the knowledge that somewhere in Reykjavík, a black cat is scratching at someone’s door, and someone else is about to learn exactly how far they’ll go.

Dead Weight Kindle by Hildur Knútsdóttir 

An Icelandic night may hide secrets and affairs – or even bodies – in this gruesomely cathartic horror thriller from the author of The Night Guest.

Unnur was living a normal, if lonely, life until a black cat showed up at her door.

When she tracks down the cat’s wayward owner, she finds a young woman just as lost and in need of help. Like a gust of cold air in a Reykjavík night, Ásta and her pet slip into Unnur’s life.

It’s unexpected, but welcome. Unnur likes the company, and she begins to rely on Ásta in turn. But like a black cat, trouble has been tailing her new friend, and Unnur is the only one there for Ásta when things take a violent turn.

The two women quickly learn: nothing tests a friendship like blood on your hands.

Also by Hildur Knútsdóttir:

The Night Guest