Christopher John Francis Boone is a fifteen-year-old autistic savant obsessed with Sherlock Holmes. He knows all the countries of the world and their capitals and every prime number up to 7,057. He relates well to animals but has no understanding of human emotions. He cannot stand to be touched. And he detests the color yellow. This improbable story of Christopher's quest to investigate the suspicious death of a neighborhood dog makes for a captivating and unusual tale.