What reading level is the Humphrey Adventures series?

The Humphrey Adventures series by Betty G. Birney is at a Grades 3.8–4.4 reading level (average Grade 4.1). Intended for Middle Grades (Ages 9–12). There are 10 books in the series.

What order should I read the Humphrey Adventures books?

The Humphrey Adventures series has 10 books in order: 1. Adventure According to Humphrey, 2. Friendship according to Humphrey, 3. Imagination according to Humphrey, 4. Mysteries according to Humphrey, 5. School days according to Humphrey, and 5 more.

What age is the Humphrey Adventures series appropriate for?

The Humphrey Adventures series is recommended for Middle Grades (Ages 9–12). The average content intensity is 1/5.

Humphrey Adventures Books in Order

10 books by Betty G. Birney. Reading level: Grades 3.8–4.4. 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. Humphrey Adventures (10 books by Betty G. Birney) lands at reading level Grades 3.8–4.4, 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 3.8–4.4

Reading Level

1/5

Avg. Intensity

Middle Grades

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

First book Latest book

Humphrey Adventures Reading Order

#	Title	Reading Level	Content
1	Adventure According to Humphrey Betty G. Birney	Level 4-5	Gentle
2	Friendship according to Humphrey Betty G. Birney	Level 4	Gentle
3	Imagination according to Humphrey Betty G. Birney	Level 3-4	Gentle
4	Mysteries according to Humphrey Betty G. Birney	Level 3-4	Gentle
5	School days according to Humphrey Betty G. Birney	Level 4-5	Gentle
6	Secrets According to Humphrey Betty G. Birney	Level 4-5	Gentle
7	Spring according to Humphrey Betty G. Birney	Level 3-4	Gentle
8	The world according to Humphrey Betty G. Birney	Level 4-5	Gentle
9	Trouble According to Humphrey Betty G. Birney	Level 4-5	Gentle
10	Winter according to Humphrey Betty G. Birney	Level 4	Gentle

Level 4 Gentle

Questions about the Humphrey Adventures series

What reading level is the Humphrey Adventures series?: The Humphrey Adventures series by Betty G. Birney is at a Grades 3.8–4.4 reading level (average Grade 4.1). Intended for Middle Grades (Ages 9–12). There are 10 books in the series.
What order should I read the Humphrey Adventures books?: The reading-order table above lists all 10 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 Humphrey Adventures series appropriate for?: The Humphrey Adventures series is recommended for Middle Grades (Ages 9–12). 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.