I want to keep growing as a writer. I find myself doing unexpected projects and sort of challenging my idea of where I am in my career, or what I'm supposed to be doing. In fact, I'm not supposed to be doing anything. Just finding projects that are challenging to me. I want to be a writer who keeps growing and figuring out new things and hopefully people will follow me along as I publish these things.

I think being a writer was a crappy job when you just had typewriters. It was crappy when we just had ink and paper. And it's sort of crappy now. It's always just you and the page. That doesn't change.

In the 1930s, the government paid writers to interview 80- and 90-year-old former slaves, and I read those accounts. I came away realizing - not surprisingly - that many slave masters were sadists who spent a lot of time thinking up creative ways of hurting people.

A lot of people, when they first hear about the Underground Railroad, think it really is a subway or a locomotive. When they find out it's not, they feel a little disappointed. So I thought, What if it was a literal underground train network traveling from state to state, with each state it goes through representing a different opportunity or danger?

What does the perfect elevator look like, the one that will deliver us from the cities we suffer now, these stunted shacks? We don't know because we can't see inside it, it's something we cannot imagine, like the shape of angels' teeth. It's a black box.

In terms of why everything is different, each book is different than the one before because I'm so bored of what I just finished I want to work on something different. The next book becomes an antidote to what I did before.

If I have three ideas and I'm working on one more than the others, that sort of tells me that I should work on that one.