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Science Explorer: Follow the Clues Books in Order

Science Explorer: Follow the Clues is a 5-book series by Tamra Orr for ages 9–12, at a grades 4–5 reading level, with gentle content (HootRated intensity 1/5).

Books
5
By publication date
Reading level
Grades 4–5
Average grade level 5.1
Recommended ages
Ages 9–12
From HootRated age ratings
Content intensity
Gentle
HootRated 1/5

Science Explorer: Follow the Clues Reading Order

Series numbers aren't available for most Science Explorer: Follow the Clues books, so they're listed by publication date (oldest first).

# Title Reading Level Ages Content
1 Battling extinction
2014
Level 4-5 9-12 Gentle
2 Tracking an epidemic
2014
Level 5-6 9-12 Gentle
3 Studying Sinkholes
2015 · Tamra B. Orr
Level 5-6 9-12 Gentle
4 Understanding Sound
2015 · Tamra B. Orr
Level 4-5 9-12 Gentle
5 Growing nutritious food
2016
Level 5-6 9-12 Gentle

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

1
2
3
4
5
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. Science Explorer: Follow the Clues (5 books by Tamra Orr) 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.

All Science Explorer: Follow the Clues Books

Battling extinction

Tamra Orr

Cover of Battling extinction

Battling extinction

Tamra Orr

Level 4-5

Tracking an epidemic

Tamra Orr

Cover of Tracking an epidemic

Tracking an epidemic

Tamra Orr

Level 5-6

Studying Sinkholes

Tamra B. Orr

Cover of Studying Sinkholes

Studying Sinkholes

Tamra B. Orr

Level 5-6

Understanding Sound

Tamra B. Orr

Cover of Understanding Sound

Understanding Sound

Tamra B. Orr

Level 4-5

Growing nutritious food

Tamra Orr

Cover of Growing nutritious food

Growing nutritious food

Tamra Orr

Level 5-6 Gentle

Similar reading level, content intensity and themes.

Questions about the Science Explorer: Follow the Clues series

What reading level is the Science Explorer: Follow the Clues series?
Science Explorer: Follow the Clues books are at a grades 4–5 reading level (average grade level 5.1), and HootRated recommends the series for ages 9–12. There are 5 books in the series.
What order should I read the Science Explorer: Follow the Clues books?
Series numbers aren't available for most Science Explorer: Follow the Clues books, so HootRated lists them by publication date: Battling extinction (2014); Tracking an epidemic (2014); Studying Sinkholes (2015); Understanding Sound (2015); Growing nutritious food (2016).
What age is the Science Explorer: Follow the Clues series appropriate for?
HootRated recommends Science Explorer: Follow the Clues 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.