Curious Incident is not a book about asperger's....if anything it's a novel about difference, about being an outsider, about seeing the world in a surprising and revealing way. The book is not specifically about any specific disorder.

Sometimes we get sad about things and we don't like to tell other people that we are sad about them. We like to keep it a secret. Or sometimes, we are sad but we really don't know why we are sad, so we say we aren't sad but we really are.

How pleased we are to have our eyes opened but how easily we close them again.

All the other children at my school are stupid. Except I'm not meant to call them stupid, even though this is what they are.

I think the U.K. is too small to write about from within it and still make it seem foreign and exotic and interesting.

There was a time in my life when I was going in and out of houses that were extraordinarily different - from a working-class terrace in Northampton to the homes of friends who were really very wealthy. It was quite an odd position to be in, I realise looking back, and quite a nice one.

Siobhan also says that if you close your mouth and breathe out loudly through your nose it can mean that you are relaxed, or that you are bored, or that you are angry and it all depends on how much air comes out of your nose and how fast and what shape your mouth is when you do it and how you are sitting and what you just said before and hundreds of other things which are too complicated to work out in a few seconds.