System 44 Books in Order
System 44 is a 3-book series for ages 9–12, at a grades 1–2 reading level, with gentle content (HootRated intensity 1/5).
- Books
- 3
- By publication date
- Content intensity
- Gentle
- HootRated 1/5
System 44 Reading Order
Series numbers aren't available for most System 44 books, so they're listed by publication date (oldest first).
| # | Title | Reading Level | Ages | Content |
|---|---|---|---|---|
| 1 | System 44 Next Generation Audiobooks Upper elementary. Series 19-25 2014 | Level 2-3 | 9-12 | Gentle |
| 2 | Gross Bugs! | Level 1-2 | 9-12 | Gentle |
| 3 | Hunt and Kill: A Look at Predators | Level 1-2 | 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. System 44 (3 books by Various Authors) lands at a grades 1–2 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 System 44 Books
System 44 Next Generation Audiobooks
System 44 Next Generation Audiobooks
Gross Bugs!
Gross Bugs!
Hunt and Kill: A Look at Predators
Hunt and Kill: A Look at Predators
Series Like System 44: What to Read Next
Similar reading level, content intensity and themes.
- Pebble Plus; Exploring the Galaxy by Thomas K. Adamson 13 books · Grades 1–2 · gentle content
- Blastoff! Readers; Learning About the Earth by Emily K. Green 5 books · Grades 2–3 · gentle content
- Be An Expert! by Erin Kelly 9 books · Grades 1–2 · gentle content
- Marine Life for Young Readers by Stanley L. Swartz 6 books · Grades 1–3 · gentle content
- PowerKids Press; Giants on the Road by Norman D. Graubart 3 books · Grades 1–2 · gentle content
- Dash!; Animal Pranksters by Julie Murray 6 books · Grades 2–3 · gentle content
Questions about the System 44 series
- What reading level is the System 44 series?
- System 44 books are at a grades 1–2 reading level (average grade level 2), and HootRated recommends the series for ages 9–12. There are 3 books in the series.
- What order should I read the System 44 books?
- Series numbers aren't available for most System 44 books, so HootRated lists them by publication date: System 44 Next Generation Audiobooks (2014); Gross Bugs!; Hunt and Kill: A Look at Predators.
- What age is the System 44 series appropriate for?
- HootRated recommends System 44 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.