Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.3
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
6888
Points per Word
0.000145
Page Count
48
Points per Page
0.020833
Series
Cool Science (Lerner)
Description
This book presents a history of military technology from ancient to modern times.