Trials of Apollo Books in Order
Trials of Apollo is a 5-book series by Rick Riordan for ages 9–12, at a grades 4–5 reading level, with moderate to intense content (HootRated intensity 3–4 out of 5).
- Books
- 5
- In series order
- Content intensity
- Moderate to intense
- HootRated 3–4 out of 5 · avg 3.2
Trials of Apollo Reading Order
All 5 Trials of Apollo books, numbered in series order.
| # | Title | Reading Level | Ages | Content |
|---|---|---|---|---|
| 1 | The Hidden Oracle | Level 4-5 | 9-12 | Moderate |
| 2 | The Dark Prophecy | Level 4-5 | 9-12 | Moderate |
| 3 | The Burning Maze | Level 4-5 | 9-12 | Intense |
| 4 | The Tyrant's Tomb | Level 4-5 | 9-12 | Moderate |
| 5 | The Tower of Nero | Level 4-5 | 9-12 | Moderate |
Content Intensity Across the Series
ConsistentContent stays at a steady intensity level throughout the series.
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. Trials of Apollo (5 books by Rick Riordan) lands at a grades 4–5 reading level, with average content intensity 3.2/5. 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 Trials of Apollo Books
The Hidden Oracle
Rick Riordan
The Hidden Oracle
Rick Riordan
The Dark Prophecy
Rick Riordan
The Dark Prophecy
Rick Riordan
The Burning Maze
Rick Riordan
The Burning Maze
Rick Riordan
The Tyrant's Tomb
Rick Riordan
The Tyrant's Tomb
Rick Riordan
The Tower of Nero
Rick Riordan
The Tower of Nero
Rick Riordan
Series Like Trials of Apollo: What to Read Next
Similar reading level, content intensity and themes.
- Percy Jackson & the Olympians by Rick Riordan 5 books · Grades 4–5 · moderate to very intense content
- Heroes of Olympus by Rick Riordan 5 books · Grades 4–5 · moderate to intense content
- Warriors: The Power of Three by Erin Hunter 6 books · Grades 4–5 · mild to intense content
- Warriors: Super Edition by Erin Hunter 14 books · Grades 4–6 · mild to moderate content
- Fablehaven by Brandon Mull 5 books · Grades 4–5 · mild to moderate content
- The Underland Chronicles by Suzanne Collins 5 books · Grades 4–8 · moderate to intense content
Questions about the Trials of Apollo series
- What reading level is the Trials of Apollo series?
- Trials of Apollo books are at a grades 4–5 reading level (average grade level 4.7), and HootRated recommends the series for ages 9–12. There are 5 books in the series.
- What order should I read the Trials of Apollo books?
- Read the Trials of Apollo books in series order: Book 1: The Hidden Oracle; Book 2: The Dark Prophecy; Book 3: The Burning Maze; Book 4: The Tyrant's Tomb; Book 5: The Tower of Nero.
- What age is the Trials of Apollo series appropriate for?
- HootRated recommends Trials of Apollo for ages 9–12. Content is moderate to intense (HootRated intensity 3–4 out of 5). Intensity stays consistent across the series, so a reader who can handle the first book can generally handle the rest.