I like to allow young readers to keep writing in their heads after they've finished reading. Not to leave the ending too open, but enough so they can imagine: What does this mean? My young adult books usually end in a far more obscure way.

I have people say that they love how I keep them off balance as to what is real or not real about pretty much everything I write. I think it's an accurate description of how I feel every day. I can't tell what's real and what's not anymore. I think that's what makes art.

I do write about thinkers. And that's what I love about reading. My favorite books, the ones that made me sit there for days, weeks, months, years, and pop back into my head - they make me think a lot.