Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.1
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
3440
Points per Word
0.000291
Page Count
38
Points per Page
0.026316
Description
This book briefly profiles some notable inventors from Johannes Gutenberg to John Baird, covering more than one hundred inventions that changed the world.