Hello, There is a fascinating but challenging book now awaiting a validator. It is called The code Book How to make it, break it, hack it, crack it by Simon Singh. Here is the long synopsis It's known as the science of secrecy. Cryptography: the encoding and de coding of private information. And it is history's most fascinating story of intrigue and cunning. The battle between codemakers and codebreakers has been going on for centuries: from Julius Caesar and his Caesar cipher to the codebreaking achievements of the tenth-century Arabs; from the code used by Mary Queen of Scots in an attempt to dethrone Elizabeth I to Sir Francis Walsingham's decipherment of that code, which led to Mary's execution for treason; from the Germans' use of the Enigma machine for automatic encryption in the Second World War to Alan Turing's efforts to infiltrate Enigma, which contributed to the Allied victory. And the battle rages on. How private are your e-mail communications? How secure is sending your credit card information over the Internet? And how much secrecy will the government tolerate? Simon Singh follows the evolution of secret writing with a clarity that lets the reader enjoy the captivating story while easily absorbing the details of cryptography. Woven throughout are clear and concise illustrations of the processes of enciphering and deciphering. Accessible, compelling and timely, this international bestseller, now adapted for young people, is sure to make readers see the past- and the future-in a whole new way. And here are my extensive comments to the validator Book is 263 pages long including the index. I have not edited the index, but have read and tried to edit the rest of the book. I can not guarantee the validity of most of the cipher alphabets, but many tables have been fixed, and the mathematical formulas have been corrected with the ^ symbol indicating "to the power of". THE CODEBREAKER'S CHALLENGE at the end of the book is corrected. As the Validator you may want to add some of my comments or comments of your own to the long synopsis field before final upload. I don't want to do it now because I won't know what else will be checked. I would say that the text of the book is in excellent shape, but with all the other stuff I can't validate well, I won't say that the entire book is any higher than good quality. Of course the automated check will be completely wrong, since this book is actually supposed to contain a large amount of meaningless garble. I forgot to mention that I replaced all tabs with 5 spaces for lack of a better idea. I can indeed tell if the normal alphabet is written correctly just by hearing it pronounced now. I enjoyed reading it even though I sometimes got a headache from trying to figure out if it was okay. Anyone who takes this book on is to be congratulated and much appreciated. Sarah Van Oosterwijck http://home.earthlink.net/~netentity/