2017 READING CHALLENGE RECOMMENDATIONS
The new year is a time to challenge yourself to reach new […]
Hello, I'm an eBook!
ATTENTION: This item is an eBook. It can be read on iOS, Android, MAC and PC's with a supported eReader. It is not a physical book. eBooks are available via download immediately after you've checked out.
Shipped from other seller
Converts one physical book into a digital version.
eDelivery converts your used book order into a digital version readable on most devices.
Ships directly from Better World Books
M and N Media
Everything from smoke signals to military encryption devices
"Codes and Ciphers" reveals the development and role of secret communications throughout history and offers practical advice on how to make codes (whether by pencil and paper or by computer) and how to break them
Inside you will find information on: Code-breaking devices Hieroglyphics, Native American smoke signals, flags, and semaphore Braille, Morse code, and computer language Mono- and polyalphabetic letter substitution Computer algorithms
Our best deal on used books 3 for $10 and just $3 each additional book. Shop and Save
Gift Certificate = Happy Friend + Books donated to families in need. Make Someone Happy »
We match every book you purchase with a book donation. Learn more »
Sign up now to get news, sales and special promotions!
© Better World Books (BetterWorldBooks.com)