Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
9.8
Points
3.0
Fiction/Nonfiction
Nonfiction
Word Count
15687
Points per Word
0.000191
Page Count
72
Points per Page
0.041667
Series
Inventions and Inventors
Description
This book discusses inventions that have affected military and warfare, tracing their history and explaining how they worked then and how they work now.