Bacon, who starred in Koepp's Stir Of Echoes twenty years ago, brought Kehlmann's book to Koepp's attention. According to Deadline's Anthony D'Alessandro , "The film version varies from that of the book, which is akin to Stephen King’s The Shining. You Should Have Left is the unsettling story of a wealthy man with a younger wife and six-year-old child. Mistrust and suspicion characterize their marriage while they are in a remote location that may or may not be obeying all the physical laws of the universe."

Bacon was on hand last night at a Barnes & Noble in New York City to moderate a discussion with Koepp about Koepp's first novel, Cold Storage, which hit stores this week. That same day, Koepp participated in an hour-long "Ask Me Anything" discussion on reddit. "My first novel, Cold Storage, came out this week," Koepp stated in the reddit introduction. "It's about a deadly organism that absolutely MUST be contained and destroyed, but is neither contained nor destroyed. Mayhem ensues."

In the ensuing discussion, Koepp was asked, "What's been the biggest challenge going from screenwriting to novel writing?" Koepp replied, "Just the scope of a novel. It was something I'd wanted to do for a long time -- not write a novel per se, but write in a longer format -- but still, the sheer amount of typing involved was impressive. Even for a brisk novel like Cold Storage. But I was DELIGHTED by the ability to go inside a character's head, to delve into someone's thoughts, after 30 years of only being able to write what they do or say."

Koepp was not asked anything specific about his work with Brian De Palma, but he did answer a question about collaborating as a screenwriter with directors:

Collaborating can be a joy, and it can be torture. Sometimes both with the same person. For the most part, I've really enjoyed my collaborations with directors. I'd say ninety percent of the time they've been true partnerships, and there's been respect and encouragement on both sides. The other ten percent of the time -- well, it sucked. I'm sure you've been in bad relationships, where you feel like no matter what you say it's the wrong thing, and you KNOW that no matter what THEY say it's the wrong thing. Same thing with a bad collaboration.

Or, sometimes, you get along great, but the combination of your particular talents just isn't producing good work. That happens too, and it's sorta the worst.

All work with directors is close. You are the two people who have the greatest creative stake in the movie, and you're the two that are with it the longest. All the others come and go, but you and director remain. So it is a close and long-lasting relationship. Unless the director fires you, of course. And make no mistake, that power is theirs, and not yours.