Should you be in need of one of those books that you read in a delicious, headlong rush because you can’t possibly put it down, I recommend My Sister, The Serial Killer, the debut novel by Nigerian-British author Oyinkan Braithwaite.

It’s crime fiction, but it’s also a wickedly dark comedy, a wise examination of the bonds within a family, and a character study of a young woman who just can’t say no – to her sister, who has a nasty habit of killing her boyfriends.

And it’s also longlisted for the prestigious Booker Prize – a rare honour for a thriller. Judges for the prize said Braithwaite’s novel is “as skilful, sharp and engaging a debut as any first novelist can produce”, packed with prose “as pointed as a lethal weapon,” according to British newspaper The Guardian.

The novel is told from the point of view of Korede, a nurse who lives with her family in Lagos, Nigeria. She’s a quiet, painfully tidy young woman who exists in the shadows of her beautiful, vivacious sister Ayoola, the favoured child of their widowed mother.

(“Ayoola’s loveliness is a phenomenon that took my mother by surprise,” muses Korede. “She was so thankful that she forgot to keep trying for a boy.”)

'My Sister, The Serial Killer' by Oyinkan BraithwaiteAyoola is the sort who expects others to clean up her messes – quite literally. Luckily, Korede knows that bleach can clean away a multitude of stains.

I’ll say no more, just know that this quick, compact novel will take you to unexpected places; some of them grisly, but some of them unexpectedly moving.

My Sister, The Serial Killer was a big hit upon its publication in 2018; it was named to a number of best-books-of-the-year lists and was a finalist for the prestigious Women’s Prize for Fiction.

Though she’s part of a strong recent line of Nigerian-born women authors – among them Ayebami Adebayo (Stay With Me), Chimamanda Ngozi Adichie (Half Of A Yellow Sun, Americanah), Helen Oyeyemi (Boy, Snow, Bird; Gingerbread), and Chinelo Okparanta (Under The Udala Trees) – Braithwaite’s voice is unique; I’ve never read anything quite like My Sister, The Serial Killer, and I can’t wait to read more from this author.

Braithwaite answered some questions over email.

Did you initially set out to write a serial-killer thriller that was funny? Or did the wit emerge along the way? 

I didn’t realise the story was funny until the initial reviews started to come out! Prior to that, I would not have described it as a comedy, dark or otherwise. Though I think the humour came about because I was writing a dark tale and I didn’t want to be immersed in darkness for that length of time. So my characters were very matter of fact about the horrific things taking place, and so was I.

What was the initial spark or inspiration for this story? 

In 2007, I wrote a poem about the black widow spider. Then I followed it soon after with a poem about two friends. The prettier friend was the traditional black widow – marrying men, poisoning them and inheriting their wealth. In 2017, when I began writing My Sister, The Serial Killer, I was able to draw from these two poems.

This is your first novel, and I’m always interested in how novelists approach their work. Did you plot everything out in advance or sketch out the characters and see where they took you? (Perhaps literally sketching, as you’re an artist?) 

I definitely didn’t plot everything out. I find if I know everything that is meant to happen, I lose the desire to write it out. I like to be surprised. But I did have a general idea of who my characters were and what they would be doing. I developed them as I wrote. I still haven’t learnt to draw directly from my imagination, but perhaps I will in the future.

My Sister, The Serial Killer is a quick read, with short, propulsive chapters and a can’t-put-this-down quality. Was it quick to write? 

Yes, it was very quick to write. I wrote it in a sort of frenzy. I also wrote each chapter in a separate Word document. I rarely looked back during the first draft.

This novel would be entirely different from Ayoola’s point of view. Was it always entirely from Korede’s consciousness, or did you ever consider additional voices? 

I liked that Korede was in the story but was also outside of it. She isn’t the catalyst. Her point of view was perfect.

I’ve heard that you are a big fan of the Brontes. Was Jane Eyre, Wuthering Heights or any other classic an influence on your writing of this novel? Also, what crime fiction authors do you admire? 

I thought of Wuthering Heights before writing my novel. Wuthering Heights is narrated by characters that are not active participants in the tale. Korede is certainly more involved but she isn’t the killer and she isn’t the victim, at least not in the obvious sense. I am a big fan of Minette Walters. I also enjoy reading Karin Slaughter, Lee Child. I read Scrublands by Chris Hammer recently and really enjoyed it. – The Seattle Times/Tribune News Service