<P> After a long and event - filled journey, evading policemen and feeling ill from the overwhelmingly large amount of information and stimuli from the trains and crowds around him, he finally finds his way to his mother and Mr Shears's home, and waits outside until they arrive . Judy is delighted that Christopher has come to her; she is upset that Ed told Christopher that she was dead . Mr Shears does not want Christopher living with them and never did . Very soon after arriving, Christopher wants to return to Swindon in order to take his mathematics A-level . His mother leaves Mr Shears, their relationship having broken down because of their conflict about Christopher and Mr Shears's rejection of Christopher . Judy then moves into a rented room in Swindon . After an argument with Ed, she agrees to let Ed meet Christopher for daily brief visits . Christopher remains terrified of his father and makes repeated attempts to prevent him from talking . He hopes Ed will be imprisoned for killing Wellington, although his mother explains that for this to happen, Mrs Shears would have to press charges . </P> <P> The story ends with Ed getting Christopher a Golden Retriever puppy, whom Christopher gets to name, and promising that he will rebuild trust with Christopher slowly, "no matter how long it takes". Christopher asserts that he will take further A-level exams and attend university . He completes his mathematics A-level with top grades despite having eaten and slept very little . Earlier in the story he talks about wanting to become an astronaut, but at the end he declares that his goal is to become a scientist . The book ends with Christopher optimistic about his future, having solved the mystery of the murdered dog, gone to London on his own, found his mother, written a book about his adventures, and achieved an A in his A-level maths exam . </P> <Dl> <Dt> Christopher John Francis Boone </Dt> <Dd> The 15 - year - old protagonist and narrator of the novel, who investigates the murder of Mrs Shears' large black poodle . </Dd> <Dt> Ed Boone </Dt> <Dd> Christopher's father, a boiler engineer . Prior to the beginning of the story, he has been living with Christopher as a single parent for two years . </Dd> <Dt> Judy Boone </Dt> <Dd> Christopher's mother . Early in the book, Christopher writes that she died of a heart attack two years before the book's events . </Dd> <Dt> Siobhan </Dt> <Dd> Christopher's paraprofessional and mentor at school . She teaches him how society works and how to behave within its complex guidelines . </Dd> <Dt> Roger Shears </Dt> <Dd> One of the neighbours who lived near the Boones, but who has left his wife before the story begins . </Dd> <Dt> Eileen Shears </Dt> <Dd> Mr Shears's wife, who attempts to console Ed for a time after Christopher learns of his mother's death . </Dd> <Dt> Mrs Alexander </Dt> <Dd> An old lady, who is one of Christopher's neighbours, who offers information to help Christopher's investigation regarding his parents and Mr and Mrs Shears . </Dd> <Dt> Rhodri </Dt> <Dd> Ed Boone's employee . </Dd> <Dt> Toby </Dt> <Dd> Christopher's pet rat . </Dd> <Dt> Wellington </Dt> <Dd> Mrs Shears' large black poodle, which Christopher finds dead in her garden, with a garden fork sticking out of him . </Dd> </Dl> <Dt> Christopher John Francis Boone </Dt>

Curious incident of the dog in the nighttime character