The Curious Incident of the Dog in the Night-time by Mark Haddon
Despite his overwhelming fear of interacting with people, Christopher, a mathematically-gifted, autistic fifteen-year-old boy, decides to investigate the murder of a neighbor's dog and uncovers secret information about his mother.
Review from School Library Journal:
When a teen discovers his neighbor's dog savagely stabbed to death, he decides to use the deductive reasoning of his favorite detective to solve the crime. Employing Holmesian logic is not an easy task for even the cleverest amateur sleuth and, in Christopher's case, it is particularly daunting. He suffers from a disability that causes, among other things, compulsive behavior; the inability to read others' emotions; and intolerance for noise, human touch, and unexpected events. He has learned to cope amazingly well with the help of a brilliant teacher who encourages him to write a book. This is his book-a murder mystery that is so much more. Christopher's voice is clear and logical, his descriptions spare and to the point. Not a word is wasted by this young sleuth who considers metaphors to be lies and does math problems for relaxation. What emerges is not only the solution to the mystery, but also insight into his world. Unable to feel emotions himself, his story evokes emotions in readers-heartache and frustration for his well-meaning but clueless parents and deep empathy for the wonderfully honest, funny, and lovable protagonist. Readers will never view the behavior of an autistic person again without more compassion and understanding. The appendix of math problems will intrigue math lovers, and even those who don't like the subject will be infected by Christopher's enthusiasm for prime numbers and his logical, mathematical method of decision making.