Raintree Fusion; Raintree Fusion: Life Science Books in Order
Raintree Fusion; Raintree Fusion: Life Science is a 2-book series by Lisa Trumbauer for ages 9–12, at a grades 3–4 reading level, with gentle content (HootRated intensity 1/5).
- Books
- 2
- By publication date
- Content intensity
- Gentle
- HootRated 1/5
Raintree Fusion; Raintree Fusion: Life Science Reading Order
Series numbers aren't available for most Raintree Fusion; Raintree Fusion: Life Science books, so they're listed by publication date (oldest first).
| # | Title | Reading Level | Ages | Content |
|---|---|---|---|---|
| 1 | Body Warriors: The Immune System (Raintree Fusion: Life Science) 2006 | Level 3-4 | 9-12 | Gentle |
| 2 | Safari Adventure (Raintree Fusion: Life Science) 2007 · Deborah Underwood | Level 3-4 | 9-12 | Gentle |
Content Intensity Across the Series
ConsistentContent stays at a steady intensity level throughout the series.
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. Raintree Fusion; Raintree Fusion: Life Science (2 books by Lisa Trumbauer) lands at a grades 3–4 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 Raintree Fusion; Raintree Fusion: Life Science Books
Body Warriors: The Immune System (Raintree Fusion: Life Science)
Lisa Trumbauer
Body Warriors: The Immune System (Raintree Fusion: Life Science)
Lisa Trumbauer
Safari Adventure (Raintree Fusion: Life Science)
Deborah Underwood
Safari Adventure (Raintree Fusion: Life Science)
Deborah Underwood
Series Like Raintree Fusion; Raintree Fusion: Life Science: What to Read Next
Similar reading level, content intensity and themes.
- Torque; Animal Battles by Thomas K. Adamson 5 books · Grades 3–4 · gentle content
- Fangs! (Gareth Stevens); Imagination Library by Eric Ethan 4 books · Grades 3–4 · gentle content
- Capstone Captivate; Rock Your World by Anita Nahta Amin 3 books · Grades 4–5 · gentle content
- Comparing Animal Traits by Rebecca E. Hirsch 14 books · Grades 4–5 · gentle to mild content
- World Book's Animals of the World by Mary E. Reid 6 books · Grades 4–5 · gentle content
- Crabtree Connections by Angela Royston 3 books · Grades 2–5 · gentle content
Questions about the Raintree Fusion; Raintree Fusion: Life Science series
- What reading level is the Raintree Fusion; Raintree Fusion: Life Science series?
- Raintree Fusion; Raintree Fusion: Life Science books are at a grades 3–4 reading level (average grade level 3.5), and HootRated recommends the series for ages 9–12. There are 2 books in the series.
- What order should I read the Raintree Fusion; Raintree Fusion: Life Science books?
- Series numbers aren't available for most Raintree Fusion; Raintree Fusion: Life Science books, so HootRated lists them by publication date: Body Warriors: The Immune System (Raintree Fusion: Life Science) (2006); Safari Adventure (Raintree Fusion: Life Science) (2007).
- What age is the Raintree Fusion; Raintree Fusion: Life Science series appropriate for?
- HootRated recommends Raintree Fusion; Raintree Fusion: Life Science 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.