What reading level is the First Reports series?

The First Reports series by Susan Heinrichs Gray is at a Grades 3.6–5.1 reading level (average Grade 4.5). Intended for Lower Grades (Ages 5–8). There are 7 books in the series.

What order should I read the First Reports books?

The First Reports series has 7 books in order: 1. Coral Reefs (First Reports), 2. Deserts (First Reports), 3. Eagles (First Reports), 4. Grasslands (First Reports), 5. Jellyfish (First Reports), and 2 more.

What age is the First Reports series appropriate for?

The First Reports series is recommended for Lower Grades (Ages 5–8). The average content intensity is 1/5.

First Reports Books in Order

7 books by Susan Heinrichs Gray. Reading level: Grades 3.6–5.1. Lower Grades (Ages 5–8).

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. First Reports (7 books by Susan Heinrichs Gray) lands at reading level Grades 3.6–5.1, with average content intensity 1/5. 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.

Books

Grades 3.6–5.1

Reading Level

1/5

Avg. Intensity

Lower Grades

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

First book Latest book

First Reports Reading Order

#	Title	Reading Level	Content
1	Coral Reefs (First Reports) Susan H. Gray	Level 4-5	Gentle
2	Deserts (First Reports) Susan Heinrichs Gray	Level 4-5	Gentle
3	Eagles (First Reports) Mary K. Dornhoffer	Level 4-5	Gentle
4	Grasslands (First Reports) Susan Heinrichs Gray	Level 4-5	Gentle
5	Jellyfish (First Reports) Mary K. Dornhoffer	Level 5-6	Gentle
6	Russia Susan Heinrichs Gray	Level 3-4	Gentle
7	Wolves (First Reports) Mary K. Dornhoffer	Level 4-5	Gentle

Level 4-5 Gentle

Questions about the First Reports series

What reading level is the First Reports series?: The First Reports series by Susan Heinrichs Gray is at a Grades 3.6–5.1 reading level (average Grade 4.5). Intended for Lower Grades (Ages 5–8). There are 7 books in the series.
What order should I read the First Reports books?: The reading-order table above lists all 7 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 First Reports series appropriate for?: The First Reports series is recommended for Lower Grades (Ages 5–8). The average content intensity is 1/5. 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.