Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.4
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
8367
Points per Word
0.00012
Page Count
64
Points per Page
0.015625
Description
This examination of the art and science behind code breaking, from ancient history to the present day, allows readers to learn about eight codes and ciphers that could not be cracked.