Lux Books in Order
Lux is a 2-book series by Jennifer L. Armentrout for ages 13+, at a grades 4–5 reading level, with moderate to intense content (HootRated intensity 3–4 out of 5).
- Books
- 2
- By publication date
- Content intensity
- Moderate to intense
- HootRated 3–4 out of 5 · avg 3.5
Lux Reading Order
Series numbers aren't available for most Lux books, so they're listed by publication date (oldest first).
| # | Title | Reading Level | Ages | Content |
|---|---|---|---|---|
| 1 | Onyx 2012 | Level 4-5 | 13+ | Moderate |
| 2 | Opal 2012 | Level 4-5 | 13+ | Intense |
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. Lux (2 books by Jennifer L. Armentrout) lands at a grades 4–5 reading level, with average content intensity 3.5/5. 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 Lux Books
Onyx
Jennifer L. Armentrout
Onyx
Jennifer L. Armentrout
Opal
Jennifer L. Armentrout
Opal
Jennifer L. Armentrout
Series Like Lux: 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
- Chronicles of Nick by Sherrilyn Kenyon 8 books · Grades 4–5 · moderate to very intense content
- Kissed by an Angel by Elizabeth Chandler 5 books · Grades 4–5 · mild to very intense content
- Pretty Little Liars by Sara Shepard 14 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
- Day of Disaster by Kristin F. Johnson 3 books · Grades 4–5 · moderate to intense content
Questions about the Lux series
- What reading level is the Lux series?
- Lux books are at a grades 4–5 reading level (average grade level 4.5), and HootRated recommends the series for ages 13+. There are 2 books in the series.
- What order should I read the Lux books?
- Series numbers aren't available for most Lux books, so HootRated lists them by publication date: Onyx (2012); Opal (2012).
- What age is the Lux series appropriate for?
- HootRated recommends Lux for ages 13+. 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.