The curious incident of the dog in the nighttime #3

I felt like the most important scene was when Christopher had decided to look through his father's room and his things to look for his book when he had found letters addressed to him that were never opened. Christopher had difficulty decided whether or not he should open them but he did because they had his name on them. Then, when he read the letters, he found out that his mother was in fact, alive, and living in England, with Mr. Shears, Mrs. Shears ex-husband. Christopher had found out that his father had lied to him about his mother dying, and when his father found out that he had read the letters, he told him that he also had killed Wellington, and I think that was just to much for Christopher's delicate mind to handle, and that's when he decided after going through the different possibilities of where he could live, because he didn't want to live with a murderer, and he couldn't trust his father, he decided that he would go to London and live with his mother.