The novel’s main character is fifteen-year-old Christopher Boone. His counselor in his special-needs school has suggested that he write a book, and so he does. Although the words “autism” and “Asperger’s syndrome” are never mentioned in the novel, it soon becomes clear that Christopher has a high functioning form of autism. Because of the particular way his brain is wired, fiction is unappealing to him; he cannot tell lies or understand most made-up stories. As he tells his narrative, the list of his quirks grows ever larger. He cannot eat things colored yellow or brown. He cannot be touched. Seeing three red cars in a row on the way to school means that it will be a good day.
From the opening pages, Christopher’s special gifts, as well as his special limitations, are apparent. He numbers his chapters using only prime numbers (2, 3, 5, 7, 11, and so forth). He always knows the precise time, and he notices that one of his teachers wears brown shoes with approximately sixty small circular holes in them. When Christopher finds a dead poodle, he is sad; he likes dogs, whose moods are much less puzzling than human moods, and he resolves to discover its killer in the style of his favourite (logical) detective, Sherlock Holmes. (enotes.com)
Christopher is likely on the autism spectrum, though this is never explicitly stated in the book. Autism was not recognized until the twentieth century, and for many years, it was regarded without question as a disorder for which a cure needed to be found. The autism rights movement began in the late 1980s and is still gaining strength, led by autistic people who believe that they need no cure; instead, society needs to change its perspective on autistic people. People on the autism spectrum, they argue, function differently than others, but not in a lesser way. In fact, they have many qualities that allow them to excel in particular areas. Curious Incident could certainly be read as expressing support for this point of view. For his part, Mark Haddon claims to know little about autism (and makes it clear that he never specifically diagnoses Christopher), saying that Christopher matters more as a character for his unique perspective on the world than for the fact that he is probably on the autism spectrum (litcharts.com)
Mark Haddon was born in Northampton in 1962. He graduated from Oxford University in 1981, returning later to study for an M.Sc. in English Literature at Edinburgh University. He then undertook a variety of jobs, including work with children and adults with mental and physical disabilities. He also worked as an illustrator for magazines and a cartoonist for New Statesman, The Spectator, Private Eye, the Sunday Telegraph and The Guardian (for which he co-wrote a cartoon strip).
In 2003 his novel, The Curious Incident of the Dog in the Night-Time, was published and has been hugely successful. It is the first book to have been published simultaneously in two imprints - one for children and one for adults. It has won a string of prestigious awards, including the 2003 Whitbread Book of the Year. His second novel, A Spot of Bother, was published in 2006 and shortlisted for the 2006 Costa Novel Award. (literature.britishcouncil.org)