A Sociopath’s Guide to a Successful Marriage

A Sociopath’s Guide to a Successful Marriage by M.K. Oliver is out now since February 17, 2026.

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A Sociopath’s Guide to a Successful Marriage Release Date: February 17, 2026

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A whip-smart and darkly funny crime novel—perfect for fans of My Sister, the Serial Killer and The Maid—that follows a wife and mother with a deadly secret that she must suppress if she wants to maintain her picture-perfect façade.

Meet Lalla Rook. Lalla has a lot on her plate: She needs to guarantee her husband makes partner, secure her dream house in Hampstead, and get her daughter into a prestigious prep school. And on the afternoon she stabs a stranger seven times after he breaks into her living room, she has a four-year-old’s birthday party to host.

With an unambitious partner, two demanding children, and a barely adequate large house in a nice (if not quite fashionable) part of town, Lalla’s life isn’t quite perfect yet. And she can’t pretend she hasn’t missed the adrenaline rush that comes with transgressing. Besides, as a wife and mother, she’s already an expert multi-tasker. So, disposing of a body, framing a friend, and being the world’s best mother can easily be managed alongside the usual domestic minutiae.

It’s just that her husband Stephen seems distracted, her daughter’s drowning of the class hamster is affecting her academic future, and then there is the unexpected intruder. Who is this man and what does he want from her? Because Lalla has a past she’d rather keep hidden—and the sudden appearance of the police means that avoiding them will be yet another task to cross off her to-do list.

Funny, calculating, hypercompetent, and ambitious, Lalla is your next favorite antiheroine. Just don’t mention it to her mother-in-law.

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Genre: Mystery

M.K. Oliver

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