This topic of the book a mystery and is called The Curious Incident of the dog in the Night-time by Mark Hadden.

The Curious Incident of the Dog in the Night-time takes place in 1998 around the town of Swindon, England. The fifteen-year-old narrator of the story, Christopher John Francis Boone was walking around the neighbourhood after he discovers the dead body of his neighbor’s poodle, Wellington, on the front lawn one evening and begins to uncover the murderer. His investigation is at times aided, and at other times hampered, by the form of autism he has. After Christopher hits a policeman in a misunderstanding at the scene of the crime, the police then took Christopher into custody. They release Christopher with only a warning, in one condition that he promises to them and to his father not to look into the murder of the poodle any further.

Christopher breaks the promise and continues his investigation of the body of the poodle, Wellington as part of a school assignment. After ignoring the warnings that his father kept on saying, Christopher continues to investigate the crime scene and conducts interviews with the residents of his block. He uncovers to a more complex plot than what it was when he discovers that his father and the owner of the slain dog, Mrs. Shears, had a romantic affair. He subsequently learns that their affair began in reaction to another relationship, they being between Mr. Shears and Christopher’s mother, before she disappeared from his life.

At school, Christopher prepares for an A-level math exam that will make him entering into a university, where no other child at his school has managed to do. He also continues to work on his book. Upon returning home one afternoon, Christopher accidentally leaves his book on the kitchen table. His father discovers the book and reads it, becomes angry, and takes it. Later, Christopher searches for the book and stumbles across a series of letters, hidden in a shirt box in his father’s closet, addressed to him from his mother. The letters contained repeated requests for Christopher to respond. In shock, Christopher passes out in his bedroom surrounded by the evidence of his father’s deception. When Father comes home and realizes what has happened, he begins to cry. He apologizes for his lies, explaining that he acted out of a desire to protect Christopher because of his mother’s abandonment of the family. Christopher’s father also admits that he was the one that killed Wellington after an argument with Mrs. Shears, his lover.

Christopher, now terrified of his father and feeling he can no longer trust him so sneaks out of the house and travels to London to live with his mother. During the journey, he copes with and overcomes the social fears and limitations of his condition, hiding from the police and almost getting hit by a train. When his arrival at his mother’s flat comes as a total surprise to her, she had no CLUE whatsoever that Christopher’s father had been hiding the letters from his mother. Christopher settles in for a time at his mother and Mr. Shears’s flat, but friction caused by his presence shortly results in his mother’s decision to leave Mr. Shears to return to Swindon. Christopher moves into a new apartment with his mother and begins to receive regular visits from his father. When Christopher’s pet rat Toby dies, Christopher’s father gives Christopher a puppy. At school, Christopher sits for his A-level math exam and receives an A grade, the best possible score. The novel ends with Christopher planning to take more A-level exams in physics and further math, and then attend a university in another town. He knows that he can do all of this because he solved the mystery of Wellington’s murder and was brave enough to find his mother.

I think this book contain a lot of mystery, disagreement, betrayal and happiness. I enjoyed reading the book as talks abut the life of Christopher.