Simon Singh is a science journalist and TV producer. Having completed his PhD at Cambridge he worked from 1991 to 1997 at the BBC producing Tomorrow's World and co-directing the BAFTA award-winning documentary Fermat's Last Theorem for the Horizon series. He is the author of Fermat's Last Theorem, which was a no 1 bestseller in Britain and translated into 22 languages. In 1999, he wrote The Code Book which was also an international bestseller and the basis for the Channel 4 series The Science of Secrecy.