Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.0
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
8359
Points per Word
0.00012
Page Count
80
Points per Page
0.0125
Description
From stone tablets to cell phones, from the days of ancient civilizations to today's modern world and the quest to organize time and lives, this book investigates the development and evolution of one of the world's most important tools.