"If I Stay" the movie is out Aug. 22, starring Chloë Moretz as Mia and Jamie Blackley as Adam. The trailer above shows the teens' romance and Mia walking away from her famiy's car accident. "Am I dying?" she asks, watching paramedics attend to her.
In the book, Mia is in a coma after the accident, deciding if she will go on living or not. Turning that story into a film was "the farthest thing from my mind" when she was writing, Forman told Library Journal this summer.
"[The filmmakers] really paid attention to the book. I think they all knew that the book had a really special resonance with readers," Forman added.
The author signed 500 books and movie posters with Moretz in Dallas this week, posting a picture of the two of them looking frazzled on her Tumblr. She's posting contests, behind-the-scenes pics and news about the film too.
The movie is bringing new life to "If I Stay," the book: it tops Apple's iBooks store and Amazon's print bestseller list and is currently No. 3 in Amazon's Kindle store.