I am currently presenting a TV series for Channel 4 in Britain, entitled The Science of Secrecy. It airs on Thursday nights at either 9.00 or 9.30pm until November 2. The final programme includes an exclusive interview with Clifford Cocks, the secret co-inventor of RSA. This is the first time that a British Government cryptographer has been permitted to talk about his work. Details of the series can be found on the Channel 4 website The series is accompanied by a book entitled The Science of Secrecy. Please note, this is an adaptation of The Code Book, and so it will not be of interest to anybody who has already read The Code Book. It has the advantage of following the series more closely and contains more illustrations. Hence, I would certainly recommend it to anybody who has not read The Code Book, and who wants to learn more about cryptography having watched the TV series. I hope that the TV series will be shown overseas, but as yet there are no plans to do this. http://www.simonsingh.com/cipher.htm