Great Brain Books in Order
8 books by John Dennis Fitzgerald. Reading level: Grades 5–5.8. 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. Great Brain (8 books by John Dennis Fitzgerald) lands at reading level Grades 5–5.8, with average content intensity 1.4/5.
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.
Content Intensity Across the Series
VariesContent intensity ranges from Gentle to Moderate across the series.
Great Brain Reading Order
| # | Title | Reading Level | Content |
|---|---|---|---|
| 1 | Me and my little brain John Dennis Fitzgerald | Level 5 | Moderate |
| 2 | More adventures of the great brain John Dennis Fitzgerald | Level 5-6 | Gentle |
| 3 | The great brain John Dennis Fitzgerald | Level 5-6 | Gentle |
| 4 | The Great Brain at the Academy John Dennis Fitzgerald | Level 5-6 | Gentle |
| 5 | The Great Brain Does it Again Unknown | Level 5 | Gentle |
| 6 | The great brain is back John Dennis Fitzgerald | Level 5 | Gentle |
| 7 | The Great Brain Reforms John Dennis Fitzgerald | Level 5-6 | Gentle |
| 8 | The return of the Great Brain Unknown | Level 5-6 | Mild |
All Great Brain Books
Me and my little brain
John Dennis Fitzgerald
Me and my little brain
John Dennis Fitzgerald
More adventures of the great brain
John Dennis Fitzgerald
More adventures of the great brain
John Dennis Fitzgerald
The great brain
John Dennis Fitzgerald
The great brain
John Dennis Fitzgerald
The Great Brain at the Academy
John Dennis Fitzgerald
The Great Brain at the Academy
John Dennis Fitzgerald
The Great Brain Does it Again
Unknown
The Great Brain Does it Again
Unknown
The great brain is back
John Dennis Fitzgerald
The great brain is back
John Dennis Fitzgerald
The Great Brain Reforms
John Dennis Fitzgerald
The Great Brain Reforms
John Dennis Fitzgerald
The return of the Great Brain
Unknown
The return of the Great Brain
Unknown
Questions about the Great Brain series
- What reading level is the Great Brain series?
- The Great Brain series by John Dennis Fitzgerald is at a Grades 5–5.8 reading level (average Grade 5.2). Intended for Middle Grades (Ages 9–12). There are 8 books in the series.
- What order should I read the Great Brain books?
- The reading-order table above lists all 8 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 Great Brain series appropriate for?
- The Great Brain series is recommended for Middle Grades (Ages 9–12). The average content intensity is 1.4/5. 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.