One of the coolest things David Fincher did on Gone Girl was keep Gillian Flynn on as screenwriter. Probably the powers that be wanted a dude. I don’t know, just a guess. Here is what the talented Ms. Flynn had to say about the adaptation process:
“I read tons of screenplays and watched a lot of movies. Since my director was David Fincher, I read all the screenplays and rewatched all the movies—that was not bad homework. I also watched movie adaptations I really respected, like The Talented Mr. Ripley. Then I went to town with my book. I read it one last time; I listened to it on audio so it could wake up my brain in a different way, and then I didn’t look at it again—except to grab certain lines of dialogue—so I could let it become a movie.”
Source: Vanity Fair
Screen caps after the jump.