
Published September 10th, 2026 by Mountain Leopard Press
Mystery, Suspense, Psychological Thriller
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ABOUT THE BOOK:
YOU TOLD HER YOUR DARKEST SECRETS.
NOW MILLIONS WILL READ THEM . . .
‘A gripping thriller that plumbs the dark depths of our closest relationships’ CLAIRE MCGOWAN
‘Brilliant and chilling . . . I tore through the pages’ – SARAH EASTER COLLINS
‘What a unique premise and so well executed. Tight plotting, and great characters. THE BESTSELLER is set to fly. I loved it!’ – LOUISE SWANSON
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Therapist Helena Salve knows that client confidentiality is the number one unbreakable rule of her job. But the constant stories of coercive control and threat she hears from her client Belle about her dangerous husband have been wearing her down. One night over too many glasses of wine, she tells her best friend Tala everything that Belle has told her.
The problem is, Tala is a down-on-her-luck novelist who is looking for an idea for her new thriller.
Months later, Tala is excitedly telling Helena that her publisher is saying this is going to be her biggest book ever. The story is Belle’s story. Not only is Helena’s job on the line, but if Belle’s husband is as dangerous as she says, her life is too…
Why would Tala do this to Helena? She knows what’s at stake.
Your friends are meant to protect you… aren’t they?
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MY REVIEW:
Therapist Helena Salve knows client confidentiality is the most important rule in her profession. But, after a few too many glasses of wine, she finds herself telling her best friend Tala all about her new client Belle’s abusive relationship. A year later, struggling novelist Tala tells her she’s written her best thriller yet. One that her publishers are sure will send her into the stratosphere. But she’s being cagey about it and won’t say what it’s about. When she finally reads it, Helena is horrified to learn Tala has written Belle’s story. Now her job is at risk and she’s worried Belle’s dangerous husband will come after her. Why would her best friend do this to her?
A compelling, tense and twisty debut about love, friendship, coercive control, secrets and betrayal, The Bestseller is a page-turning debut. A thought-provoking read, it poses some important questions about human behaviour, morality and toxic relationships. Jenny Knight explores coercive control and toxic relationships throughout the story, writing with honesty but also compassion. She makes sure we understand why Belle might not be able to see that she’s being abused and is reluctant to leave, something I appreciate as a survivor. She also expertly showcases how kindness, charm and protection are used by abusers to explain away their control and make the victim feel loved.
This is a book about relationships and at the heart of the story is the friendship between Helena and Tala. It’s a well-written relationship that is full of all the complexities and nuance that you’d expect from a decades-long friendship. They have a strong bond but there is something from their past they won’t ever discuss. Something that still haunts both of them decades later. Clues are dropped like breadcrumbs for us to follow, while a past timeline slowly reveals their secret and helps us to understand them and their friendship.
I did guess most of the twists but it didn’t take away from my enjoyment of the book as Jenny was skilled at making me second-guess my predictions. And that ending! Talk about leaving me reeling.
A gripping debut that all thriller lovers should have on their TBR.
Rating: ✮✮✮✮✰
Thank you Mountain Leopard Press for sening me a copy of the book in exchange for my honest review.
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ABOUT THE AUTHOR:

Jenny Knightsby is a hospital doctor based in West London. The Bestseller was shortlisted for the Lucy Cavendish Fiction Prize 2024 and is Knightsby’s debut novel.
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Thanks for reading, Bibliophiles xxxxx
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