The Curious Incident of the Dog in the Night-time

Just by seeing the name of this book, I surpposed it would be a "detective book".
There was one question kept coming up to me, "Is this novel really written by a mental-ill teenage?" If it is not, the author must be a genious.
I had never read any novel or fiction written in this way. It is narritive, which is common; it uses many pictures, numbers, graphs, which are not common; it tells so many things, most of which seem have nothing to do with the "death of the dog", which is really uncommon; the extreme characterist of "Christopher" indeed challenge my ajudgment, "he is either Einstein kind of genious or a high-mental-ill kid.All of these elements provoke my curiosty, attract me keep reading it till figuring out what the earth in Christopher's mind.
The reason I reject this book is not written by a real mental-ill person is I don't think any publisher will risk to publish a book written by a mental-ill child as Chrisopher. If it really was, the teacher would not recommand it as a school text book. Then whoever wrote this book must be a genious. Only a genious can make the readers forget everything around when they are reading his book.