Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
5.8
Points
0.5
Fiction/Nonfiction
Nonfiction
Word Count
3160
Points per Word
0.000158
Page Count
32
Points per Page
0.015625
Series
Underground Worlds
Description
This book explores the history of the underground transportation systems, including subways, tunnels, roads, and more.