Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
7.9
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
8054
Points per Word
0.000124
Page Count
56
Points per Page
0.017857
Description
This book explores the history of alien invaders that are deliberately or accidentally introduced to a new habitat and, subsequently, explode in numbers, causing harm to property and wildlife. The coauthor is Ann Love.