Christopher Boone is autistic. He is a math genius but hates the colours yellow and brown. His neighbour's dog is killed and Christopher decides to investigate. This book is not a straight path to the killer but rather a delightful quirky meandering path. Along the way we learn some math problems and about Christopher's school. We find out about his parents' quarrels and his daily life.
Christopher is emotionally distant and takes everything very literally. This leads to the most inventive investigation and a most interesting read