Simon Singh is a science journalist and TV producer. Having completed his Ph.D. 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. In 1997, he published Fermat's Last Theorem, which was a no 1 best-seller in Britain and translated into 22 languages. In 1999, he published The Code Book.