This book is an unparalleled murder mystery novel narrated by fifteen-year-old Christopher Boone, who has Asperger's Syndrome. Proficient in mathematics but lacking understanding of human emotions, Christopher loves lists, patterns, and the truth. Averse to yellow and brown and averse to physical contact, he embarks on a frightening journey after discovering a neighbour's murdered dog, unravelling a narrative that will completely disrupt his world.