What reading level is the Cooper Kids Adventure series?

The Cooper Kids Adventure series by Frank E. Peretti is at a Grades 5.1–5.9 reading level (average Grade 5.6). Intended for Middle Grades (Ages 9–12). There are 7 books in the series.

What order should I read the Cooper Kids Adventure books?

The Cooper Kids Adventure series has 7 books in order: 1. Escape from the Island of Aquarius, 2. Flying Blind, 3. The deadly curse of Toco-Rey, 4. The door in the dragon's throat, 5. The secret of the Desert Stone, and 2 more.

What age is the Cooper Kids Adventure series appropriate for?

The Cooper Kids Adventure series is recommended for Middle Grades (Ages 9–12). The average content intensity is 2.1/5.

Cooper Kids Adventure Books in Order

7 books by Frank E. Peretti. Reading level: Grades 5.1–5.9. 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. Cooper Kids Adventure (7 books by Frank E. Peretti) lands at reading level Grades 5.1–5.9, with average content intensity 2.1/5. 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 5.1–5.9

Reading Level

2.1/5

Avg. Intensity

Middle Grades

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

First book Latest book

Cooper Kids Adventure Reading Order

#	Title	Reading Level	Content
1	Escape from the Island of Aquarius Frank E. Peretti	Level 5-6	Mild
2	Flying Blind Frank E. Peretti	Level 5-6	Mild
3	The deadly curse of Toco-Rey Frank E. Peretti	Level 5-6	Mild
4	The door in the dragon's throat Frank E. Peretti	Level 5-6	Mild
5	The secret of the Desert Stone Frank E. Peretti	Level 5-6	Mild
6	Tombs of Anak Frank E. Peretti	Level 5-6	Mild
7	Trapped at the bottom of the sea Frank E. Peretti	Level 5-6	Moderate

Level 5-6 Moderate

Questions about the Cooper Kids Adventure series

What reading level is the Cooper Kids Adventure series?: The Cooper Kids Adventure series by Frank E. Peretti is at a Grades 5.1–5.9 reading level (average Grade 5.6). Intended for Middle Grades (Ages 9–12). There are 7 books in the series.
What order should I read the Cooper Kids Adventure 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 Cooper Kids Adventure series appropriate for?: The Cooper Kids Adventure series is recommended for Middle Grades (Ages 9–12). The average content intensity is 2.1/5. 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.