The Curious Incident Of the Dog In The Night-time is a unusual mystery novel. The detective, and narrator, is Christopher Boone. Christopher is fifteen and has Asperger's, a form of autism. He knows a very great deal about maths and very little about human beings. He has never gone further than the end of the road on his own, but when he finds a neighbour's dog murdered he sets out on a terrifying journey which will turn his whole world upside down.