Daniel Tammet FRSA (born 31 January 1979) is an English writer, essayist, translator, and autistic savant. His 2006 memoir, Born on a Blue Day, about his life with high-functioning autism and savant syndrome, was named a "Best Book for Young Adults" in 2008 by the American Library Association.Tammet was the subject of a documentary film entitled (in the UK) The Boy with the Incredible Brain, first broadcast on the British television station Channel 4 on 23 May 2005.