| The Case of the Weird Sisters | |
| Author: | Charlotte Armstrong |
| Country: | United States |
| Language: | English |
| Series: | MacDougal Duff |
| Genre: | Mystery |
| Publisher: | Coward-McCann |
| Release Date: | 1943 |
| Media Type: | |
| Preceded By: | Lay On, Mac Duff! |
| Followed By: | The Innocent Flower |
The Case of the Weird Sisters is a 1943 mystery thriller novel by the American writer Charlotte Armstrong. It was first published in New York by Coward-McCann, an imprint of Putnam.[1] It was the second in a trilogy featuring amateur detective MacDougal Duff, preceded by Lay On, Mac Duff! and followed by The Innocent Flower.[2]
In 1948 it was adapted into the British film The Three Weird Sisters directed by Daniel Birt and starring Nancy Price, Raymond Lovell and Nova Pilbeam.[3] Produced by British National Films, it shifted the setting from America to Wales and removed the character of MacDougal Duff.