Online Search of “Gillian Flynn Agatha Christie”: The Connection Between Flynn’s Gone Girl and Hitchcock’s Psycho

I just searched “Gillian Flynn Agatha Christie,” and found that Christie’s disappearance is still well known, and people have related it to Flynn’s Gone Girl. Moreover, Flynn is reported to have said that Christie is her favorite mystery writer.

Gillian Flynn is also reported to have said in interviews that, as a child, she watched Alfred Hitchcock’s film Psycho many times. And she practiced imitating the facial expression of its main character.

However, in my brief search of the above, they failed to mention the key connection between Flynn’s Gone Girl and Hitchcock’s Psycho: They are both about characters with multiple personality.