Throughout the text are clear technical and mathematical explanations, and portraits of the remarkable personalities who wrote and broke the world's most difficult codes. Accessible, compelling, and remarkably far-reaching, this book will forever alter your view of history and what drives it. It will also make you wonder how private that e-mail you just sent really is.
"Entertaining and satisfying. . . . Offers a fascinating glimpse into the mostly secret competition between codemakers and codebreakers." --USA Today
"A good read that, bless it, makes the reader feel a bit smarter when it's done. Singh's an elegant writer and well-suited to the task of leading the mathematically perplexed through areas designed to be tricky." --Seattle Weekly
"An absorbing tale of codemaking and codebreaking over the centuries." --Scientific American
"Singh spins tales of cryptic intrigue in every chapter." --The Wall Street Journal
"Brings together...the geniuses who have secured communications, saved lives, and influenced the fate of nations. A pleasure to read." --Chicago Tribune
"Enthralling...commendably lucid...[Singh's] book provides a timely and entertaining summary of the subject." --The Economist