책 세부 정보
형식
페이퍼백
페이지
160
언어
영어
출판됨
Jan 1, 2010
출판사
Scholastic
ISBN-10
1407114565
ISBN-13
9781407114569
설명
First the ancient Greeks hid messages under their hair. Then Mary Queen of Scots completely lost her head because of a cracked code. Now computers create codes no human can crack. This is the ultimate guide to unlocking the secret language of spies.