From the moment nurse Sarah Keate arrives at the gloomy mansion of Adolph Federie, she senses trouble afoot, from the mysterious occupants of the house to the penetrating stare of a black cat named Genevieve. But Mr. Federie has just suffered a stroke and needs a live-in aid and Sarah is not one to shirk her duties.

When a murder occurs in the same room as her patient, Sarah starts investigating along with the help of a local police officer. But how will she sleep at night knowing she’s sharing a house with a killer?

An early title in the career of a crime writer whose many novels landed on bestseller lists for much of the twentieth century, While the Patient Slept a creepy and atmospheric whodunit sure to please any fan of classic mysteries. It was included in the legendary Haycraft-Queen list of the greatest mystery novels of all time.