"The Curious Incident of the Dog in the Night-Time" is a novel by Mark Haddon, first published in 2003. The story is told from the perspective of Christopher Boone, a 15-year-old boy who has autism. He lives in Swindon, England, and has a unique way of seeing the world.

Christopher loves math and science and enjoys solving puzzles. One day, he finds his neighbor's dog, Wellington, dead in the yard. He decides to investigate the dog's death, which leads him on a journey that uncovers family secrets and his own personal challenges.

As Christopher explores his neighborhood and interacts with various people, he faces difficulties due to his condition, including trouble with understanding emotions and social cues. His adventure helps him grow and learn more about himself and his family.

The novel touches on themes of family, trust, and the challenges of living with autism. It has received numerous awards and has been adapted into a successful stage play. The story is both heartwarming and thought-provoking, offering readers a glimpse into the mind of a young person who sees the world differently.