A Stranger in the House

A Stranger in the House by Shari Lapena is a standalone domestic thriller published in 2017, her second novel and a New York Times, Sunday Times, and number-one Canadian bestseller following the success of The Couple Next Door.

Tom Krupp comes home to find dinner half-made, his wife Karen gone, and her purse, phone, and keys still on the kitchen counter. Within hours he's at the hospital, where Karen is recovering from a car crash - not in any neighbourhood she had any reason to be in, driving at speed through red lights with no apparent explanation for why she left the house in such a hurry. She has a concussion. She can't remember anything. Inconveniently for everyone, a man's body has been found in an abandoned restaurant not far from where her car left the road, and Detective Rasbach - familiar to readers of The Couple Next Door - finds the timing rather difficult to ignore.

What makes this a distinctive entry in Lapena's catalogue is how thoroughly she layers the Memory Loss premise with genuine Dark Secrets rather than simply using it as a plot device. Karen's amnesia is real, but even before the accident her marriage contained gaps Tom was never quite shown into - a past she arrived with that she's never fully unpacked, friends who don't exist, family on her side of the wedding photographs who were conspicuously absent. The Unreliable Narrator dynamic operates on two levels here: Karen genuinely can't remember what happened, but she also hasn't been entirely honest about who she is to begin with, and the gap between what Tom thought he knew about his wife and what he's discovering now widens steadily as the investigation continues.

The neighbourhood itself does real work, as it does in Lapena's debut. Brigid, the couple's neighbour, has her own long history with Tom that predates his marriage to Karen, and her sustained Obsession & Desire - watching the Krupps' house from her window while nursing feelings she's never quite let go of - gives the novel a secondary thread that adds real unease to the domestic setting. The Deception running through multiple relationships in the street keeps the question of who to trust consistently unstable, and Lapena's Multiple POV structure moves between Karen, Tom, and Brigid in short, punchy chapters that maintain pace even when the central mystery is deliberately withholding.

The Mystery and Secrets Revealed across the novel's back half reframes what Karen was actually doing that night, and the Twist Ending delivers Lapena's now-familiar double-beat resolution - an answer that turns out to contain a further answer still waiting underneath it. Reception has been more divided than for The Couple Next Door, with the secondary plot threads and the pace of the middle section the most common criticisms, but readers who come for Lapena's fast, propulsive pacing and willingness to wrong-foot them on the home stretch consistently find it a satisfying one-sitting read.