The Curious Incident of the Dog in the Night-Time

 

  In the Curious Incident of the Dog in the Night-Time, Christopher has done a lot.  His father was very angry for being nosy and poking around in things that are none of his business.  He has told Christopher before to stop doing this and Christopher decided to make the hasty decision to not listen to his father and to go through with the investigation.  In an act of anger Christopher's father took his investigation book or the story that he is writing from him and threw it away.
  Even though hid book was taken away, Christopher is still very dedicated to the investigation and carries through with it.  He looks for the book in the trash can and they weren't there.  Then he looks for the book all around the house without success.  He then gets an idea; his father's room.  He has never been aloud to go in there but that does seem like the most logical explanation as to where he would put the book.
  While he is in his father's room, he does find his book as well as a little bit more...

http://www.mayoclinic.com/health/aspergers-syndrome/DS00551
This article is about Asperger's Syndrome which seems to be the disorder that Christopher seems to have.

This video is another clip explaining what asperger's syndrome is.