The Stranger Next Door (French: Les Catilinaires) is a Belgian novel by Amélie Nothomb.
The book begins when a retired couple, Emile and Juliette Hazel, achieve their dream of buying a house in the woods to live alone together, far from the public world.
To be polite, Emile and Juliette decide to meet them, and thus come in contact with Palamède Bernardin, who develops the habit of coming into their house everyday precisely at 4pm, sitting in an armchair and waiting until 6pm, barely saying a word, at which time he, ever punctually, goes back home.
The visits become slowly more and more unbearable, until the Hazels resolve to get rid of him.
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