This website features Simon Singh, "an author, journalist and TV producer, specialising in science and mathematics." The website reviews some of his books, such as "the story of the Big Bang theory" and its "curious incidents and peculiar characters." The Code Book, which can be downloaded for free from his website, offers a beginner's cryptography tutorial, encryption tools, code breaking tools, coded messages to crack, resources for teachers, and an animated section on quantum cryptography. Singh has also developed "the virtual Black Chamber," a website "where you can learn about codes and codebreaking, encrypt your own messages, crack those of your enemies, and play with interactive enciphering programmes." Other sections describe his theatrical and television accomplishments, including directing a program on Fermat's Last Theorem. Several articles on cryptography, Fermat's Last Theorem and Erdos-Bacon Numbers ("six degrees of separation") are also posted online. Archived copies of his periodic newsletter (which he emails to anyone who subscribes) gives "updates on current projects, announces any programmes that are about to be transmitted, highlights forthcoming public lectures and allows me to have a rant if there is something that has been annoying me."