A fifteen-year-old detective cracks the case of a dead dog — and finds his mother alive instead.
Who drives the story
The fifteen-year-old narrator and detective, brilliant at maths, unable to lie, touched by nobody. He investigates a dog's death and ends up dismantling his family's biggest lie — then proves to himself he can do anything.
Christopher's father, a boiler engineer raising him alone for two years. He lies about his wife's death to protect his son, kills a dog in a rage, and spends the ending trying to earn back trust one daily visit at a time.
Christopher's mother, declared dead of a heart attack but actually living in London with Roger Shears. Her letters undo the lie, and in the end she chooses her son over her lover.
Christopher's paraprofessional and mentor at school, who teaches him social rules and draws faces with different expressions in his book so he can learn what emotions look like.
The estranged couple whose marriage and affair with Judy set the whole story in motion; Roger's refusal to accept Christopher costs him Judy.
Also in the story
The elderly neighbor who answers Christopher's detective questions and accidentally reveals his mother's affair with Roger Shears.
Christopher's pet rat, who hides in his coat pocket on the run to London and dies at 2 years and 7 months old, and the golden retriever puppy his father gives him — named Sandy — as a peace offering.
How they are connected
Ed BooneChristopher John Francis Boone
Christopher's father, a boiler engineer raising him alone for two years.
Judy BooneChristopher John Francis Boone
Christopher's mother, declared dead of a heart attack but actually living in London with Roger Shears.
Judy BooneRoger and Eileen Shears
Christopher's mother, declared dead of a heart attack but actually living in London with Roger Shears.
SiobhanChristopher John Francis Boone
Christopher's paraprofessional and mentor at school, who teaches him social rules and draws faces with different expressions in his book so he can learn what emotions look like.
Mrs. AlexanderChristopher John Francis Boone
The elderly neighbor who answers Christopher's detective questions and accidentally reveals his mother's affair with Roger Shears.
Mrs. AlexanderRoger and Eileen Shears
The elderly neighbor who answers Christopher's detective questions and accidentally reveals his mother's affair with Roger Shears.
Roger and Eileen ShearsChristopher John Francis Boone
The estranged couple whose marriage and affair with Judy set the whole story in motion; Roger's refusal to accept Christopher costs him Judy.
Toby and SandyChristopher John Francis Boone
Christopher's pet rat, who hides in his coat pocket on the run to London and dies at 2 years and 7 months old, and the golden retriever puppy his father gives him — named Sandy — as a peace offering.
Go deeper
Lies as protection · Difference, not deficit · The world as sensory assault · Order against chaos
Themes explainedThe full story act by act, the ending explained and a quick quiz.
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