Смерть и танцующий лакей by Ngaio Marsh

At an isolated country estate, a stylish weekend gathering is disrupted when a guest is found shot dead, and attention falls on a curious entertainer—a professional 'dancing footman' hired as a party novelty. A police detective arrives to unravel a tangle of jealousies, hidden romances and disputes over money; interviewing both family and servants he teases out false alibis and long-buried secrets, eventually exposing the motives and methods behind a murder that had been concealed beneath polite social veneers.