I am really interested in eccentric minds. It's rather like being fascinated by how cars work. It's really boring if your car works all the time. But as soon as something happens, you get the bonnet up. If someone has an abnormal or dysfunctional state of mind, you get the bonnet up.

A lot of roles for people with disabilities are quite patronising. It's a real pity when they are just used to give dull PC kudos to a drama, or when they're wheeled on in a tokenistic way without any real involvement in the plot.

And people who believe in God think God has put human beings on earth because they think human beings are the best animal, but human beings are just an animal and they will evolve into another animal, and that animal will be cleverer and it will put human beings into a zoo, like we put chimpanzees and gorillas into a zoo. Or human beings will all catch a disease and die out or they will make too much pollution and kill themselves, and then there will only be insects in the world and they will be the best animal.

I think one of the things you have to learn if you're going to create believable characters is never to make generalizations about groups of people.

Stories about mental aberration and oddity only make sense in context. Just how do people live with someone who is peculiar, gifted, strange or alien? It's odd because there's a little part of me that wants to write about exotic, strange bizarre subjects. Instead, I've rather reluctantly realised that what I write about is families.

And I go out of Father's house and I walk down the street, and it is very quiet even thought it is the middle of the day and I can't hear any noise except birds singing and wind and sometimes buildings falling down in the distance, and if I stand very close to traffic lights I can hear a little click as the colors change.

I've written 16 children's books and five unpublished novels. Some of the latter were breathtakingly bad.