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KidHaven Science Library Books in Order

4 books by Gail Stewart. Reading level: Grades 6.5–8.4. Middle Grades (Ages 9–12).

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. KidHaven Science Library (4 books by Gail Stewart) lands at reading level Grades 6.5–8.4, with average content intensity 1.3/5. Intensity stays consistent across the series — a kid who can handle the first book can generally handle the rest.

The reading-order table below lists every book with per-volume reading level and intensity badges 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.

4
Books
Grades 6.5–8.4
Reading Level
1.3/5
Avg. Intensity
MG
Middle Grades

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

1
2
3
4
First book Latest book

KidHaven Science Library Reading Order

Questions about the KidHaven Science Library series

What reading level is the KidHaven Science Library series?
The KidHaven Science Library series by Gail Stewart is at a Grades 6.5–8.4 reading level (average Grade 7.6). Intended for Middle Grades (Ages 9–12). There are 4 books in the series.
What order should I read the KidHaven Science Library books?
The reading-order table above lists all 4 books with per-volume reading level and intensity ratings. Start with book 1 and read in publication order unless the table indicates a different recommended order for newer readers.
What age is the KidHaven Science Library series appropriate for?
The KidHaven Science Library series is recommended for Middle Grades (Ages 9–12). The average content intensity is 1.3/5. Check the intensity trajectory above to see whether content gets heavier across the series — if it does, sensitive readers may want to stop earlier in the run.