Insomnia by Sarah Pinborough Summary

Insomnia by Sarah Pinborough is a psychological thriller about Emma Averell, a successful divorce attorney who develops severe insomnia as she approaches her 40th birthday. Emma fears she inherited her mother's "bad blood" after her mother suffered a violent mental breakdown on her own 40th birthday. As Emma's sleepless nights worsen, she questions her sanity and whether someone is gaslighting her into believing she's going mad.

Sarah Pinborough is a New York Times and Sunday Times #1 bestselling author published in over 25 territories worldwide. She has written more than 25 novels across various genres, including the Netflix hit Behind Her Eyes. Pinborough is known for psychological thrillers that blend suspense with supernatural elements. She is also a screenwriter who has written for the BBC and currently lives in Stony Stratford, England.

Insomnia by Sarah Pinborough is ideal for readers who enjoy psychological thrillers with unreliable narrators and unexpected twists. Fans of domestic suspense exploring generational trauma and mental health will find the narrative compelling. The book appeals to those who appreciated Behind Her Eyes, Daisy Darker by Alice Feeney, or anyone seeking a tension-filled story that blurs reality and delusion.

Insomnia by Sarah Pinborough delivers masterful suspense with relentless dread and unexpected plot twists that keep readers guessing until the final pages. The novel offers psychological depth through Emma's unraveling mind and explores profound themes of generational trauma and inherited mental illness. While some readers find the repetitive elements excessive, most praise it as Pinborough's best thriller since Behind Her Eyes.

The central theme of Insomnia by Sarah Pinborough is generational trauma and the fear of inheriting mental illness from family. Emma Averell's terror that she shares her mother's "bad blood" drives the narrative as she approaches her 40th birthday. The novel explores how childhood trauma shapes identity, the stigma surrounding mental health for women, and the desperate struggle to break free from a predetermined fate.

In Insomnia by Sarah Pinborough, Emma Averell develops severe insomnia twelve days before her 40th birthday, mirroring her mother's breakdown at the same age. Emma begins losing time, experiencing blackouts, and compulsively checking locks and windows like her mother did before going mad. When Emma is accused of murdering her mother, her perfect life unravels as she questions whether she's truly losing her mind or being gaslighted by someone close to her.

Sarah Pinborough creates suspense in Insomnia through Emma's unreliable narration and progressive mental deterioration as sleeplessness blurs reality and delusion. The repetitive compulsive behaviors—rattling locks, checking windows, mumbling numbers—build claustrophobic tension throughout the narrative. Pinborough's pacing balances repetition with frequent hints at new clues, maintaining reader engagement while questioning whether Emma faces genuine madness or elaborate manipulation.

The 40th birthday in Insomnia by Sarah Pinborough represents a cursed threshold that Emma believes triggers inherited madness. Emma's mother violently attacked her older sister on her own 40th birthday before being committed to a psychiatric facility. This specific age becomes Emma's source of dread, symbolizing the moment when "bad blood" manifests and family trauma repeats across generations.

Insomnia by Sarah Pinborough integrates subtle supernatural elements that feel natural within the psychological thriller framework. Unlike Behind Her Eyes, the supernatural aspects in Insomnia are more seamlessly woven into Emma's deteriorating mental state rather than feeling gimmicky. The narrative maintains ambiguity between psychological breakdown and otherworldly influences, requiring readers to suspend disbelief while questioning what is truly happening to Emma.

Critics of Insomnia by Sarah Pinborough note the plot feels overly repetitive as Emma performs the same compulsive behaviors throughout the narrative. Some readers find Emma's blatant favoritism toward her younger son unlikable and the gaslighting trope overused in contemporary thrillers. The epilogue has been criticized as unnecessary, and while the twist's execution is strong, the reveal's plausibility leaves some readers unsatisfied despite being more grounded than Pinborough's previous works.

Insomnia by Sarah Pinborough examines mental health stigma through Emma's fear of being perceived as "mad" like her mother, which threatens her career and family relationships. The narrative shows how societal stigma surrounding mental illness, particularly for women, prevents Emma from seeking help or being honest about her deteriorating condition. Emma's isolation intensifies as her family focuses on the consequences of her problems rather than addressing the underlying causes with empathy.

Insomnia by Sarah Pinborough is set in contemporary Leeds, UK, grounding the psychological horror in relatable urban and suburban landscapes. The modern-day setting contrasts Emma's internal chaos with mundane family life—school runs, work meetings, and domestic routines—which enhances the domestic thriller elements. This ordinary backdrop makes Emma's descent into paranoia and sleeplessness more terrifying as her familiar world becomes fraught with danger and uncertainty.