Me and Ma have a deal, we're going to try everything one time so we know what we like.

The idea was to focus on the primal drama of parenthood: the way from moment to moment you swing from comforter to tormentor, just as kids simultaneously light up our lives and drive us nuts. I was trying to capture that strange, bipolar quality of parenthood. For all that being a parent is normal statistically, it's not normal psychologically. It produces some of the most extreme emotions you'll ever have.

I think I know what it's like to have a family that the outside world sees as peculiar or lacking.

With a time-based medium like theater or film, you can't have the audience getting restless in their seats. They're stuck there on their bums; you have to pay enormous attention to pace and you can't lose your way.

I needed to do a lot of saying no. I had a lot of [interest] from people who I just didn't think were quite right for it. And I didn't want a bad film to be made of the book, either a sentimental one or a creepy one, so I did a lot of, "No thank you." Then when the right filmmaker came along, yes, I suppose I presented myself very much as wanting to be the writer.

Kissing a witch is a perilous business. Everybody knows it's ten times as dangerous as letting her touch your hand, or cut your hair, or steal your shoes. What simpler way is there than a kiss to give power a way into your heart?

So much as I enjoy big novels of epic sweep, I often find, say, if they follow several generations, by the third generation, I'm not caring about the people anymore.