The Curious Incident of the Dog in the Night-Time Add a review

The Curious Incident of the Dog in the Night-Time is a 2003 mystery novel by British writer Mark Haddon. Its title refers to an observation by the fictional detective Sherlock Holmes (created by Arthur Conan Doyle) in the 1892 short story "The Adventure of Silver Blaze". Haddon and The Curious Incident won the Whitbread Book Awards for Best Novel and Book of the Year, the Commonwealth Writers' Prize for Best First Book, and the Guardian Children's Fiction Prize. Unusually, it was published simultaneously in separate editions for adults and children.

The novel is narrated in the first-person perspective by Christopher John Francis Boone, a 15-year-old boy who is described as "a mathematician with some behavioural difficulties" living in Swindon, Wiltshire. Although Christopher's condition is not stated, the book's blurb refers to Asperger's syndrome. In July 2009, Haddon wrote on his blog that "The Curious Incident is not a book about Asperger's ... if anything it's a novel about difference, about being an outsider, about seeing the world in a surprising and revealing way. The book is not specifically about any specific disorder", and that he, Haddon, is not an expert on the autism spectrum or Asperger's syndrome.

The book uses prime numbers to number the chapters, rather than the conventional successive numbers. Originally written in English, it has been translated into 36 additional languages.