The Unwilling Plus One: A Dark RomCom
The Killer Kin Series Book 1
by Effie Campbell
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Pub Date Feb 01 2026 | Archive Date Feb 13 2026
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Description
A fake boyfriend.
A killer family.
And a deadly wedding.
Maggie Hamilton comes from a long line of people paid to dish out death. Unfortunately, Maggie is a family failure. Age? Twenty-nine. Kill count? Zero. When her father decides to marry her off to her psychotic ex at thirty, Maggie panics and hatches the world’s worst plan: fake a relationship to buy herself some time.
Enter Roman Ellis. Maggie's hot, grumpy neighbour and internet-famous 'celibacy' influencer. Little does he know that Maggie knows all about his secret life. She hears it all through her bedroom wall. He’s gorgeous, insufferable, and wouldn't look at her twice given the chance.
But Maggie isn't giving him the chance; she's taking him home whether he likes it or not.
They just need to make it through an eleven-hour drive to the Highlands for her father’s wedding. With Roman tied to the passenger seat, a suspicious stepmother-to-be who may or may not be poisoning the groom, and a stalker ex lurking in the wings.
All Maggie has to do is survive the week without dying, killing anyone, or falling in love.
Unfortunately, Roman has a talent for making her want to do all three.
Darkly funny, spicy and unhinged, The Unwilling Plus One is a rom-com for truly unconditional love.
Advance Praise
Reviews from GoodReads
This was my first Effie Campbell book and I am hooked. It had the right amount of fun and banter plus a serious side and spice. Maggie is the black sheep of her contract assassin family. She's the eldest and has never been able to finish a job. Roman is her neighbor and she is sure he doesn't know she exists. She decides to kidnap him and blackmail into being her fate for her father's wedding. Their banter and chemistry was so fun. Roman helps her see she's more than the family disappointment and helps her stick up to them.
- Amber
This book is wild. Imagine this: You get drugged to be taken as a plus one to a wedding by, I kid you not, a failed contract killer!
Maggie is our failed contract killer, that needs to go home, to Scotland, to attend a whole series of wedding activities. She knows she will be forced to wed someone she doesn't want. So in order to avoid this she drugs, kidnaps and basically forces her neighbor, Roman, to be her fake boyfriend.
The story that follows is hilarious and the banter in it is sharp and sarcastic. Exactly how I like it.
The book is relatively short (not a bad thing), so I do feel we could have a little bit more insight in the family written in the book. Also the 180 Roman did considering his behavior towards Maggie could have been dragged out a bit more.
- Brenda
“The Unwilling Plus One” brings us a heartfelt and hilarious romance between Maggie, a failed h!twoman and Roman, a celibacy influencer, who practises anything but! Maggie needs to bring a boyfriend to his father’s wedding and Roman is the perfect guy for that! K!dnapping, blac*mail and a lot of this-can’t-be-good-for-you dr*gs, Maggie realizes she doesn’t fit in the family, especially when Roman seems to be killing it! Ok… so not literally, but everyone in the family is loving Roman and Maggie still feels like she doesn’t fit in.
I love Maggie! She' just wants to live her life peacefully, baking cookies with the most boring office job ever, but the pressure to inherit the family’s business drives her to constantly question herself. She’s really easygoing and a fun person to be around, and she’s kind. It was an absolute joy to read her POV, and my heart broke for her several times. She’s got spirit and a very weak stomach!
Roman was completely out of his element, but as soon as he saw how Maggie was treated and how she accepted being “weak” when she was just a regular person made him feel like he needed to defend her. Go Roman! It’s not that Maggie needed someone defending her, she was born into that family, she was expected something, and they still loved her, but the constant jabs were something that, while she dealt with, hurt her in the end. She talked about herself with some self-deprecation, and Roman, my boy, he was not having it! There’s nothing better than a man who accepts you for who you are, faults and all, and still does everything in his power to protect you from the world! The world is mean and sometimes women can be fierce and independent but TIRING! The universe, living is TIRING! So yeah, we just want a guy to hold us against the world.
Roman and Maggie are such cuties, Roman is usually battling his conflicted feelings, but he’s the best abductee ever! Maggie is always trying to make the situation better. Together their chemistry is amazing and the side characters are also a riot!
“The Unwilling Plus One” is Effie more comical side in dark romance, more of a very light rom-com, but it feels amazing to read something so adorable within the dark aspects. It’s very heart warming and I hope to see these two again!
- Adeselna
https://www.goodreads.com/book/show/242867978-the-unwilling-plus-one
Available Editions
| ISBN | 9798245570228 |
| PRICE | $5.99 (USD) |
| PAGES | 338 |