From bestselling author of If Cats Disappeared from the World comes a taut psychological mystery based on a real-life crime for fans of Butter and Diary of a Void.

She works quietly in a coastal shipyard office, barely noticed by those around her. Life passes in grey repetition until one day, on the side of a road, she sees something that changes everything: a black horse, still and watching.

From that moment, something begins to shift.

As her obsession deepens, so does the double life she builds in secret. What begins with a quiet longing grows into something far more dangerous - and far more difficult to control.

Horse and I is a haunting, slow-burning psychological novel about the hunger for freedom in a world that insists on keeping women small. With echoes of Butter and Diary of a Void, it probes the uneasy space between yearning and transgression, beauty and brutality, and asks how far a person will go for the one thing that makes them feel alive.

A tense and mesmerising Japanese mystery where desire, silence, and power collide.