Codes and Secret Writing

I love this book! It features a variety of information, including an interesting introduction of codes. There is even a little history of codes in the past. Next, it moves right on to simple codes. This section has an easy picture code, a code you can use on a computer, and some number codes. Chapter three is all about position codes, and chapter four is about code wheels. Chapter five includes my favorite code- the Rail Fence. There is also a section on breaking codes and secret languages. Invisible ink ends this wonderful book.