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World Book's Animals of the World Books in Order

World Book's Animals of the World is a 6-book series by Mary E. Reid for ages 9–12, at a grades 4–5 reading level, with gentle content (HootRated intensity 1/5).

Books
6
By publication date
Reading level
Grades 4–5
Average grade level 4.7
Recommended ages
Ages 9–12
From HootRated age ratings
Content intensity
Gentle
HootRated 1/5

World Book's Animals of the World Reading Order

Series numbers aren't available for most World Book's Animals of the World books, so they're listed by publication date (oldest first).

# Title Reading Level Ages Content
1 Howlers and Other New World Monkeys
2000
Level 4-5 9-12 Gentle
2 Owls and Other Birds of Prey
2000
Level 4-5 9-12 Gentle
3 Wolves and Other Wild Dogs
2000
Level 4-5 9-12 Gentle
4 Jellyfish and Other Stingers (World Book's Animals of the World)
2001 · World Book Encyclopedia
Level 4-5 9-12 Gentle
5 Alligators and Other Crocodilians
2011 · Gari D. Fairweather, World Book, Inc
Level 5 9-12 Gentle
6 Jellyfish and other stingers
2012 · Joseph K. Brennan
Level 4-5 9-12 Gentle

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

1
2
3
4
5
6
First book Latest book

Series books grow with readers — but that's also the trap. Most series start at one reading level and one content intensity and drift upward over the course of the run. World Book's Animals of the World (6 books by Mary E. Reid) lands at a grades 4–5 reading level, with average content intensity 1/5. Intensity stays consistent across the series, so a reader who can handle the first book can generally handle the rest.

The reading-order table above lists every book with per-volume reading level, age and intensity ratings so you can spot any escalation before it catches your reader off guard. For a deeper dive into how we score text difficulty vs. emotional weight separately — and why series readers especially benefit from that split — see our methodology page.

Similar reading level, content intensity and themes.

Questions about the World Book's Animals of the World series

What reading level is the World Book's Animals of the World series?
World Book's Animals of the World books are at a grades 4–5 reading level (average grade level 4.7), and HootRated recommends the series for ages 9–12. There are 6 books in the series.
What order should I read the World Book's Animals of the World books?
Series numbers aren't available for most World Book's Animals of the World books, so HootRated lists them by publication date: Howlers and Other New World Monkeys (2000); Owls and Other Birds of Prey (2000); Wolves and Other Wild Dogs (2000); Jellyfish and Other Stingers (World Book's Animals of the World) (2001); Alligators and Other Crocodilians (2011); and 1 more.
What age is the World Book's Animals of the World series appropriate for?
HootRated recommends World Book's Animals of the World for ages 9–12. Content is gentle (HootRated intensity 1/5). Intensity stays consistent across the series, so a reader who can handle the first book can generally handle the rest.