Dyslexic author Sally Gardner has won the Carnegie Medal for her novel Maggot Moon.
The book tells the story of a dyslexic boy living in an alternative 1950s Britain, whose rulers are intent on winning the space race.
The award was presented at a ceremony at the Natural History Museum in London on Wednesday.
"I'm still wondering if I'm going to wake and find that winning the Carnegie Medal is a dream," Gardner said.
"If it is true, then it has the quality of a dream come true."
The BBC reports Maggot Moon also won this year's Costa Children's Book Award. Her first novel I, Coriander won the Nestle Children's Book Prize Gold Award in 2005.
She described her own education as a dyslexic child as "a comedy of errors" and said she was once considered "unteachable".
The Carnegie prize was founded in 1937. Previous winners include Philip Pullman, Anne Fine, Terry Pratchett and CS Lewis.