Chapter 149-157

Next Monday when Christopher goes to school again, Siobhan asks him wheter Dad had hit him and how it happened. But Christopher answers that he can´t remember because he had a blackout. When he gets home he starts to look for his book that his Dad threw away. After he doesn´t find it in the dustbin in the yard he starts to look for it in all the other rooms and finally in his Dads room. There he finds it in a box in the cupboard but he decides to leave it there for now so his father wouldn´t know he took it again. Just when he hears his Dads van pull into the driveway he sees a bunch of letters in the same box which are addressed to him. But because he doesnt have a lot of time he just takes one and puts the box back where it was so his Dad wouldn´t notice anything.
After dinner Christopher goes up to his room and reads the letter. It is addressed to him and signed with "Mum" which really confuses him because the date on the letter is 16.10.97 but at this point his Mom was already dead. In the letter "Mum" says sorry for leaving him and that she has a new job and that she lives in London now with Roger and that she hopes that he isn´t mad at her forever. Christopher can´t really make sense of that and decides to wait till he can go into fathers room again and read the other letters to find out wheter it was really his Mom or somebody sent the letter to a wrong address and meant to send it to another Christopher.

Chapter113-149

After school Christopher goes home and watches some videos untill his Dad comes home. But as soon as he comes in Chris remembers that he has forgotten the book (he is writing) on the kitchen table. His Dad gets really angry and shouts at Chtistopher because he told him so many times not to try to find out more about Wellingtons murder anymore. At one point he grabbs Christophers arm really hard and like we know he doesnt like that at all so he hits him and him and his Dad start to fight. Christopher then has a blackout for a short time which means he cant exactly remember what happend the last coupple of minutes and when he is conscious again he hears his Dad throw away his book outside.
The next day his father excuses for hitting him in the face and takes him to Twycross Zoo to see some animals. There he tells Christopher that he loves him and if something like that happens it´s only because he worries about him. Christopher understands that and spreads his fingers out in a fan to touch his Dads hand to tell him everything is good again (that´s what they do to say that they love each other because Christopher doesn´t like hugging etc.).

Chapter73-113

As Chris tells his Dad that he thinks Mr Shears killed Wellington, he tells him to not mention his name in this house anymore because the man was "evil". This makes Chris wonder even more but he promises his Dad to stop his detective work anyways.
A couple of days later Christopher meets Mrs Alexander on the street who tells him the real reason why his Dad doesn´t want him to talk about Mr Shears. That´s because he had an affair with Christophers Mom and his Dads wife which destroyed their marriage.
When Christopher shows the book to one of his teachers, Siobhan, the next school day(because she looks if he makes any writing or grammar mistakes) she asks him whether he was sad about the thing with his Mom and Mr Shears. But he answers No, because mother was dead and it would be stupid to be sad about something that isn´t there anymore.

Chapter47-73

Christopher finally decides to keep locking for Wellingtons murderer even though his Dad told him to stop sticking his nose into other people businesses. He plans on doing that with the help of "white lies" which is not exactly lying but leaving out the parts which could bother the other person (in christophers case his Dad) . At first he decides to talk to Mrs Shears and tell her that he is looking for the culprit but she threats him by saying she is going to call the cops again so he leaves after taking a look at her shed and recognizing the fork with which Wellington was killed.
The next saturday he continues his detective work and peays every house in his street a visit to question the people about the incident. But that doesn´t get him further so he comes to the conclusion that probably Mr Shears killed Wellington because he broke up with Mrs Shears and he could be hating her and wanting to hurt her. But he doesnt know a lot about him so he decides to find out more about him.

Narrative style and structure of the story

The story is written out of Christopher view, the main character created by the author Mark Haddon. That makes us really see what he thinks and feels as we get the information directly from him. Also it helps us to understand the Asperger´s Disorder because Christopher writes and explains thing as he sees them. His aim with the book is to create a murder mystery novel which one of the staff members at his school, Siobhan recommended him. As Christopher really like prime numbers, because they are easy to understand and simple, all the chapters are numbered with prime numbers (so it starts with chapter 2 then 3, 5, ... ).
The content of the chapters stagger between his story about the dead dog and his feelings and things that bother him.