A murder mystery novel like no other! Christopher is fifteen and has Asperger’s, a form of autism. He knows a great deal about maths and little about human beings. He loves lists, patterns and the truth. He hates the colours yellow and brown and being touched. 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.