What reading level is the Treasure Hunters (Little, Brown) series?

Treasure Hunters (Little, Brown) books are at a grades 4–5 reading level (average grade level 4.8), and HootRated recommends the series for ages 9–12. There are 8 books in the series.

What order should I read the Treasure Hunters (Little, Brown) books?

Series numbers aren't available for most Treasure Hunters (Little, Brown) books, so HootRated lists them by publication date: Treasure hunters (2013); Secret of the Forbidden City (2015); Peril at the top of the world (2016); Treasure Hunters (2020); Treasure Hunters (2022); and 3 more.

What age is the Treasure Hunters (Little, Brown) series appropriate for?

HootRated recommends Treasure Hunters (Little, Brown) for ages 9–12. Content is mild to moderate (HootRated intensity 2–3 out of 5). Intensity stays consistent across the series, so a reader who can handle the first book can generally handle the rest.

Treasure Hunters (Little, Brown) Books in Order

Treasure Hunters (Little, Brown) is an 8-book series by James Patterson, Chris Grabenstein for ages 9–12, at a grades 4–5 reading level, with mild to moderate content (HootRated intensity 2–3 out of 5).

Books: 8; By publication date
Reading level: Grades 4–5; Average grade level 4.8
Recommended ages: Ages 9–12; From HootRated age ratings
Content intensity: Mild to moderate; HootRated 2–3 out of 5 · avg 2.1

Treasure Hunters (Little, Brown) Reading Order

Series numbers aren't available for most Treasure Hunters (Little, Brown) books, so they're listed by publication date (oldest first).

#	Title	Reading Level	Ages	Content
1	Treasure hunters 2013	Level 4-5	9-12	Mild
2	Secret of the Forbidden City 2015	Level 4-5	9-12	Moderate
3	Peril at the top of the world 2016	Level 5	9-12	Mild
4	Treasure Hunters The Plunder Down Under 2020 · James Patterson	Level 4-5	9-12	Mild
5	Treasure Hunters the Ultimate Quest 2022	Level 4-5	9-12	Mild
6	Treasure Hunters the Greatest Treasure Hunt 2023 · James Patterson	Level 4-5	9-12	Mild
7	Quest for the city of gold	Level 4-5	9-12	Mild
8	Treasure Hunters : All-American adventure	Level 4-5	9-12	Mild

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

First book Latest book

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. Treasure Hunters (Little, Brown) (8 books by James Patterson, Chris Grabenstein) lands at a grades 4–5 reading level, with average content intensity 2.1/5. Intensity stays consistent across the series, so a reader who can handle the first book can generally handle the rest.

The reading-order table above lists every book with per-volume reading level, age and intensity ratings 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.

All Treasure Hunters (Little, Brown) Books

Treasure hunters

James Patterson, Chris Grabenstein