Essay and Interview by Gillian Flynn
http://gillian-flynn.com/for-readers/
This site includes Flynn's essay "I was not a Nice Little Girl" discussing why she thinks it is important to represent violent and dark female characters, and an interview discussing Gone Girl.
Is Gone Girl Feminist or Misogynist?
http://time.com/3472314/gone-girl-movie-book-feminist-misogynist/
This article from Time magazine discusses the representations of gender in the novel and film adaptation.
Interview with Gillian Flynn
This article features an interview in which Flynn discusses her work after Gone Girl, and her plans for her next novel.