01 April 2026

A huge thank you to Headline Books and NetGalley for this review copy. Let me say upfront — I absolutely loved this book. It is brilliant, gripping, and an easy five-star read for me.

The Bestseller by Jenny Knight tackles powerful and deeply unsettling themes, including coercive control, emotional abuse, and how people — particularly women — can find themselves excusing harmful behaviour rather than recognising it for what it truly is.

The story follows Helena Salve, a dedicated therapist who specialises in couples’ counselling. On the surface, Helena seems to have a stable and fulfilling life, with a loving husband, Dylan, and a long-standing friendship with her best friend from college, Tala Trestle. However, things begin to unravel when Helena takes on a new client, Belle.

Belle quickly gets under Helena’s skin in a way no other client has before. She is trapped in a deeply troubling marriage to Julian, whose behaviour is clearly manipulative and abusive — yet Belle continually defends him, offering excuses for even his worst actions. Helena’s growing frustration and emotional involvement feel incredibly real, and you can sense her internal conflict as she struggles to maintain professional boundaries.

One evening, after a few too many glasses of wine, Helena makes a life-altering mistake: she confides in Tala, sharing Belle’s story in detail. What follows is every therapist’s worst nightmare. Months later, Tala publishes a novel — and Helena realises, with horror, that it is based entirely on Belle and Julian’s relationship.

The consequences are immediate and devastating. Helena fears for her career, her reputation, and, most importantly, Belle’s safety. What makes it even more shocking is Tala’s apparent lack of concern, raising questions about loyalty, betrayal, and the true nature of their friendship.

The narrative unfolds through a dual timeline, weaving between the present day and Helena and Tala’s college years. At first, these flashbacks seem to simply provide background, showing how their friendship formed and how Dylan came into Helena’s life. But with each return to the past, more layers are revealed, gradually exposing truths about the characters that completely shift your understanding of them.

Helena is a fascinating character — a natural fixer who wants to help everyone around her. This trait defines her relationships, including her marriage to Dylan, whom she believes she has “fixed.” But as the story progresses, it becomes clear that this need to help others may also be her greatest vulnerability.

The author does an excellent job of exploring how difficult it can be to see the people closest to us clearly, and how love, loyalty, and history can blur the truth. The tension builds steadily throughout, and just when you think you have everything figured out, the story takes a turn you don’t see coming.

The final reveal is genuinely heartbreaking and incredibly well executed — subtle, powerful, and completely unexpected.

This is a brilliantly written, well-paced thriller with perfectly timed twists that keep you guessing until the very end. It’s thought-provoking, emotional, and utterly compelling.

You do not want to miss this one.