Magnolia Between Trips

What if the biggest threat to your marriage wasn’t the laundry pile, the sleepless nights, or the endless cycle of toddler tantrums, but the fact that you and your husband used to be serial killers, and one of you just can’t quit?

That’s the deliciously unhinged premise of A Serial Killer’s Guide to Marriage, the latest novel from London-based author Asia Mackay. And somehow, impossibly, it works.

Meet Hazel (known as Haze) and Fox — a married couple living in the London suburbs with their young daughter, Bibi. On the surface, they look like any other exhausted, overscheduled family: play dates, school runs, dinner parties, and the quiet low-grade tension of a long-term relationship that has lost some of its lustre.

The twist?

They used to be vigilante serial killers. Together, they roamed Europe as the “Backpacking Butcher” duo, targeting predatory men and getting away with it spectacularly, all while falling in love along the way. Then Hazel got pregnant, and by some unspoken agreement, the knives went away. The kills stopped. Suburbia began.

For Fox, the adjustment has been remarkably smooth. He channelled his adrenaline into a successful business career and family life. For Haze, it has been nothing short of suffocating. The mom groups, the baby talk, the loss of her identity as an artist and — let’s be honest — as someone who was very, very good at eliminating terrible men from the world. The itch never left her. And when it gets too loud to ignore, Haze does something that sends their carefully constructed life into a tailspin.

The concept alone could easily veer into gratuitous territory, but Mackay handles the dark subject matter with a surprisingly light and satirical touch. This is, at its core, a sharp and often very funny commentary on modern marriage and motherhood.
The novel is written in dual first-person perspective, alternating between Haze and Fox. Seeing both sides of the marriage, their resentments, their secrets, their genuine love for each other and for Bibi gives the story a real emotional weight beneath all the dark comedy.

Mackay doesn’t just write two killers playing house; she writes two fully formed, deeply flawed human beings whose shared history and shared darkness is the very thing that binds them.

Haze in particular is a remarkable character. She is prickly, unapologetic, and not especially easy to like at first. She doesn’t bend to social expectations, has zero interest in performing warmth she doesn’t feel, and is openly contemptuous of the suburban life she’s been squeezed into. And yet, you root for her. You understand her. Mackay taps into something real about the way women are expected to sublimate themselves entirely into motherhood, and she does it through the most extreme lens imaginable.

Fox, meanwhile, is the kind of man who managed to redirect his darkest impulses into AA-style meetings and corporate ambition and the contrast between his ability to “behave” and Haze’s restlessness is one of the novel’s most entertaining and quietly pointed dynamics.

If you’re picking this up expecting wall-to-wall gore, you’ll be surprised. Mackay is far more interested in the psychological and satirical than in graphic violence. The humour is sharp, dry, and often laugh-out-loud funny. Particularly in Haze’s internal monologues, where the mundanity of toddler life bumps up against her extremely non-standard frame of reference.

Think Dexter meets Mr. & Mrs. Smith, with a strong dose of British wit and a genuine beating heart underneath. Publishers Weekly gave it a starred review, calling it “wildly entertaining” and praising the way Mackay “brilliantly exaggerates the stifling aspects of parenthood through the eyes of her charismatic killers.” That balance of funny and dark, absurd and earnest is exactly what Mackay nails.

A Serial Killer’s Guide to Marriage is one of those books that sounds like a gimmick but turns out to be something genuinely clever. It’s funny, it’s dark, it’s surprisingly moving in places, and it asks real questions about identity, compromise, and what we’re willing to give up or pick back up for the people we love.

Whether you’re a thriller fan, a dark comedy devotee, or just someone who has ever felt a little trapped by domestic life (no murder required), this one is absolutely worth your time.

Just maybe don’t read it at a mommy-and-me class.

https://www.penguinrandomhouse.com/authors/2305700/asia-mackay/