Novelist Gillian Flynn has made Gone Girl a hit—not once, but twice. The film adaptation of her 2012 best-selling book has earned $77.9 million at the box office as of press time, taking the top spot both weekends since its release. The fact that Flynn wrote the film's screenplay—which has garnered critical raves and could earn her an Oscar nod—lands her on a tiny list of authors who have successfully brought their books to life on the screen. (Only five have won Oscars for doing it.) It's a wonder more authors don't make the jump to screenwriting, especially when studios are hungrier than ever for best-selling literary brands such as The Fault in Our Stars and The Silver Linings Playbook (not to mention, you know, The Hunger Games). So why don't more novelists adapt their own work? Short answer: They're usually bad at it.