Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.2
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
5577
Points per Word
0.000179
Page Count
32
Points per Page
0.03125
Description
Learn about the strange sleep cycles throughout the animal kingdom and the theories behind why people get tired or have terrifying nightmares.