When I was writing If I Stay, there were a couple of things I thought might turn people off: All that death. The fact that Mia and Adam have a pretty racy sex scene on the page, and are implicitly sexually active off the page. I even made a couple of changes to one or two scenes with that in mind—not to censor it, but  to make it a bit more readable for a younger audience.

But there is one thing I didn't give a single thought to and that was foul language.

This might be for a couple of...