What reading level is the Little Green Readers series?

The Little Green Readers series by Meredith Costain is at a Grades 1.1–2.5 reading level (average Grade 1.9). Intended for Lower Grades (Ages 5–8). There are 17 books in the series.

What order should I read the Little Green Readers books?

The Little Green Readers series has 17 books in order: 1. American buffalo, 2. City animals, 3. Clean air, 4. Desert life, 5. Garbage detectives, and 12 more.

What age is the Little Green Readers series appropriate for?

The Little Green Readers series is recommended for Lower Grades (Ages 5–8). The average content intensity is 1/5.

Little Green Readers Books in Order

17 books by Meredith Costain. Reading level: Grades 1.1–2.5. 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. Little Green Readers (17 books by Meredith Costain) lands at reading level Grades 1.1–2.5, 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 1.1–2.5

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

Little Green Readers Reading Order

#	Title	Reading Level	Content
1	American buffalo Meredith Costain	Level 2-3	Gentle
2	City animals Meredith Costain	Level 1-2	Gentle
3	Clean air Meredith Costain	Level 1-2	Gentle
4	Desert life Meredith Costain	Level 1-2	Gentle
5	Garbage detectives Meredith Costain	Level 2-3	Gentle
6	Gorillas Meredith Costain	Level 2-3	Gentle
7	How to make an earthworm farm (Little green readers) Meredith Costain	Level 1-2	Gentle
8	Making paper Meredith Costain	Level 2-3	Gentle
9	Old to new Meredith Costain	Level 1-2	Gentle
10	Orangutans Meredith Costain	Level 1-2	Gentle
11	Power from the sun (Little green readers) Meredith Costain	Level 2	Gentle
12	Recycling Meredith Costain	Level 1-2	Gentle
13	Sea turtles Meredith Costain	Level 1-2	Gentle
14	Tidal pools Meredith Costain	Level 2-3	Gentle
15	Tigers Meredith Costain	Level 2-3	Gentle
16	Water power Meredith Costain	Level 1-2	Gentle
17	What Happens to Trash? (Little Green Readers, Set 3) Meredith Costain, Sundance/Newbridge LLC Staff	Level 2-3	Gentle

Level 1-2 Gentle

What Happens to Trash? (Little Green Readers, Set 3)

Meredith Costain, Sundance/Newbridge LLC Staff

What Happens to Trash? (Little Green Readers, Set 3)

Meredith Costain, Sundance/Newbridge LLC Staff

Level 2-3 Gentle

Questions about the Little Green Readers series

What reading level is the Little Green Readers series?: The Little Green Readers series by Meredith Costain is at a Grades 1.1–2.5 reading level (average Grade 1.9). Intended for Lower Grades (Ages 5–8). There are 17 books in the series.
What order should I read the Little Green Readers books?: The reading-order table above lists all 17 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 Little Green Readers series appropriate for?: The Little Green Readers 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.