Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
8.8
Points
3.0
Fiction/Nonfiction
Nonfiction
Word Count
14208
Points per Word
0.000211
Page Count
144
Points per Page
0.020833
Series
Venture Book
Description
This book explains the problems posed by living organisms that invade or spread to new places.