Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.3
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
4349
Points per Word
0.00023
Page Count
32
Points per Page
0.03125
Series
Inventions In...
Description
This book tells the history of inventions that changed communication, from writing and postal systems to cellular phones and the World Wide Web.