Christopher discovered that Wellington is dead ==> He want to discover who had murdered the dog, because the police doesn't do anything with the case ==> Christopher went to Mrs Alexander who invited him for the research, but Christopher was scared and ran away ==> he also did research in the garden of Mrs Shears, because they were divorced. His father had heard this and he wants that Christopher stop the research. ==> When he had a talk with Mrs Alexander, the research went on. ==> One day Christopher’s father finds the book and gets angry, because he talked to Mrs Alexander. They had had a fight and his father took the book from him and hides it. the next day after school he starts looking for his book. He finds it in his father’s bedroom and also the letters from his mother addressed to him. After reading them he concludes that his father was lying to him all these years and that his mother is alive. His father finds him sick and tells Christopher that he will never lie to him again and that he did it for Christopher’s own sake. he also tells that he is the one who killed Wellington. ==> Christopher plans to leave and live with his mother. ==> his father doesn't like this and comes to pick him up in the middle of the night, but then Christopher went with his mother to Swindon and his dad goes with him ==> Christopher gets his an A for the A-level of math ==> Christopher's dad wants him to forgive him, so he bought a dog for Christopher. ==> Christopher is happy, because he solved the mystery, he found his mother, he went to London by himself and he had written a book.