Reading Metrics
Grade Level
Middle Grades Plus (MG+ 6 and up)
Book Level
9.5
Points
8.0
Fiction/Nonfiction
Nonfiction
Word Count
40893
Points per Word
0.000196
Page Count
246
Points per Page
0.03252
Description
Combining history, paleontology, biology, and cutting-edge medical science, this book paints a picture of how two different species became deeply entwined and how we coevolved into the species we are today.