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Author Steve Silberman has won the £20,000 Samuel Johnson Prize for Non-Fiction for his book about autism.
Speaking to Afternoon Edition on ÃÛÑ¿´«Ã½ Radio 5 live in September 2015, shortly after the book was published, the author said his interest in autism came about when he heard a theory about an "epidemic" of autism in California's Silicon Valley.
The American author, who is based in San Francisco, has been a science writer for Wired and other magazines such as the New Yorker, the MIT Technology Review, Nature and Salon for more than 20 years.
He told Dan Walker and Sam Walker that the main struggles families of autistic children face in the Unites States are to do with a lack of services for older children with autism.
The judges said Neurotribes: The Legacy of Autism and How to Think Smarter About People Who Think Differently was a "tour de force" of journalistic and scientific research.

This clip is originally from 5 live Afternoon Edition on 21st September 2015.