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In this bloody but cheerful novel, a middle-aged widow and mother of two becomes a contract killer to support her family, reinventing herself along the way.

Kang Jiyoung’s Mrs. Shim Is a Killer is a kaleidoscopic novel of murder-for-hire, crisscrossing loyalties, self-determination, and dark humor. In Paige Morris’s translation from the Korean, Kang’s matter-of-fact prose reveals a sly, absurdist wit. This playfully murderous thriller is not soon forgotten.

In the first chapter, readers meet Mrs. Shim. A 51-year-old widow, she supports a family of three; her son is of university age, her daughter just younger. Since the death of her husband five years ago, she has struggled to provide for her family by working in a butcher’s shop, relying on her knife skills to eke out a living while dutifully preparing kimchi, soybean soup, and other staples at home. When she loses her job, she is desperate for other work–not easy for an ajumma, or middle-aged woman, to find. At the Smile Private Detective Agency, however, she meets a boss impressed by her use of a knife. “I’d like you to become a killer,” the man says matter-of-factly, and Mrs. Shim finds she is in no position to turn down the gold bar he offers. Reluctant at first but driven by her need to provide for her children, she becomes Smile’s best killer yet, causing surprised rumors to circulate about the knife-wielding ajumma.

Mrs. Shim Is a Killer shifts perspective to follow one character and then another, from a long list of players in Mrs. Shim’s story. Aside from the title character, chapter titles refer to them by epithet: The Boss, The Shaman, The Confidant, The Daughter. Intrigue unfolds in this series of puzzle pieces, which provides varying angles on events where killers and amateurs off killers, bosses, and more. Because not all of these character spotlights take place in the same timeline, old secrets also come to light, and present-day rivals may reveal more nuanced relationships in the past. In final standoff scenes, characters are set against one another in unexpected arrangements and, through it all, readers root for Mrs. Shim, a reluctant but determined assassin.

Kang (The Shop for Killers) plays off expectations about mothers, lovers, and cultural norms to her reader’s constant surprise. With a complexly twisting plot, disarming characters, and a deceptive sense of humor, Mrs. Shim Is a Killer breaks genre boundaries in a surprisingly hopeful package. Bloody but cheerful, this unusual tale is entertaining and strangely cozy.

This review originally ran in the February 26, 2026 issue of Shelf Awareness for the Book Trade. To subscribe, click here.

Filed under: book reviews | Tagged: family, in translation, misc fiction, Shelf Awareness |