A former teacher, alone in a remote cabin deep in the woods. A hurricane rumbling outside. And a teenage girl covered in blood knocking at the door with a knife in her hand. That is the tantalising premise of Freida McFadden’s new locked-room thriller, The Intruder. Early readers are already warning of a sleepless night ahead.
There are some novels you open promising yourself you’ll read just one chapter. With Freida McFadden, that promise never lasts. The Intruder confirms what her readers have suspected ever since The Housemaid: the novelist constructs narrative traps that are both ruthless and completely invisible — until they snap shut inexorably around her unfortunate readers.
A refuge cut off from the world
Casey has turned her back on her old life — her teaching job, her pupils, her routines — to hide away in an isolated cabin belonging to her father. Why exactly, the novel takes its time revealing.
That evening, a violent storm tears through the forests of New Hampshire, and Casey checks her supplies and reinforces what she can. Her survival routine is well practised. What is about to knock on her door is not.
Nell, the dilemma
Faced with a distressed teenager, however frightening she may seem, can you really keep the door shut? Freida McFadden presents this moral dilemma with chilling precision. Nell appears in the middle of the hurricane, drenched, covered in blood that is not her own, clutching a knife tightly in her hand. She refuses to speak and refuses to let go of the weapon.
Despite every warning sign, Casey chooses to let her in. The reader immediately senses that this decision will cost her something.
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Two timelines, one trap
The Intruder alternates between past and present with tightly controlled structure. The present-day chapters follow the hurricane night and the growing mistrust between the two women. The chapters set in the past delve into Nell’s childhood, her origins, and the abuse she endured.
Each fragment retrospectively sheds light on details from the unfolding night. The reader pieces the puzzle together at the same pace as Casey and eventually begins to wonder whether Nell truly arrived there by chance.
A tidal wave that shows no sign of stopping
Freida McFadden continues to dominate the charts. In 2025, she placed eight novels in France’s top fifteen bestsellers and sold more than 6.4 million copies in a single year, including 1.89 million paperback copies of The Housemaid alone. On 24 December 2025, the publishing phenomenon arrived in cinemas in an adaptation directed by Paul Feig and starring Sydney Sweeney and Amanda Seyfried.
Altogether, her thrillers have now surpassed 35 million copies sold across 45 languages, while in 2026 City Editions is releasing The Tenant in February, The Intruder in May, and Dear Debbie in October — an impossible pace that has fuelled widespread speculation about her identity.
Sara Cohen, doctor and architect of doubt
Behind the name Freida McFadden lies Sara Cohen, a physician specialising in brain injuries, born in New York in 1980 and now living in Boston with her husband and their two children.
Her real name, kept secret for thirteen years, was only revealed in April 2026. Tired of rumours portraying her as either an AI creation or a collective of male writers, she simply stated that she had nothing to hide. This double life between hospital work and writing perhaps explains her singular ability to dissect fear and trauma with such precision.
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