A writer's work may be a coded autobiography, but only a very close friend could decipher it.

I like stirring the pot - I think it's part of my duty, to shake people up a bit - make them look at things in a different way.

I grew up on a suburban street with lace curtains and dull neighbours, so I made up stories to tell my friend, in which they became serial killers and burglars. She told her mother, who then told mine.

I hope in my books I help children to see their strengths, and show them I have some idea of what they may occasionally be going through. Especially at tricky moments when it is easier to go back and evade things rather than go forwards and confront them.

I like writing for children. It seems to me that most people underestimate their understanding and the strength of their feelings and in my books for them I try to put this right.

The kind of response I hope for when I write my novels for children: to give them a chance to recognize something of their own feelings -- about themselves, their parents, their friends -- and their own situation as a kind of subject race, always at the mercy of the adults who mostly run their lives for them.

Adults get more confused by social worker jargon. Unlike children, they are also less likely to see two sides of an argument, and they no longer think they can make the world a better place. That can make them rather boring, I suppose.