written by p955432 on 23/01/2009
I am very interested in code breaking, this book was fantastic esprecially how he devised the frequency table...to find the most common letter in the english alphabet. I felt that it was excellent, i advise every body to read this book.......
he should have give a brief history about al-kindi because he was the first person to decode,
this book is one in a million
well done SIMON SINGH