Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.2
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
4893
Points per Word
0.000204
Page Count
48
Points per Page
0.020833
Description
This book examines the history of London's subway system, known as the Tube, including some of the challenges faced in design and construction and its uses during World War II.