Daniel Tammet is a writer, linguist and educator. A 2007 poll of 4,000 Britons named him as one of the world's "100 living geniuses." His website company, Optimnem, has provided foreign language instruction to thousands around the globe and his last book, the "New York Times" bestseller "Born on a Blue Day: Inside the Extraordinary Mind of an Autistic Savant," has been translated into 18 languages. He lives in Avignon, in the south of France.