Keeper of the Lost Cities Books in Order
9 books by Shannon Messenger. Reading level: Grade 5.5. 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. Keeper of the Lost Cities (9 books by Shannon Messenger) lands at reading level Grade 5.5, 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.
Content Intensity Across the Series
ConsistentContent stays at a steady intensity level throughout the series.
Keeper of the Lost Cities Reading Order
| # | Title | Reading Level | Content |
|---|---|---|---|
| Book 1 | Keeper of the Lost Cities Shannon Messenger | Level 5-6 | Mild |
| Book 2 | Exile Shannon Messenger | Level 5-6 | Mild |
| Book 3 | Everblaze Shannon Messenger | Level 5-6 | Mild |
| Book 4 | Neverseen Shannon Messenger | Level 5-6 | Moderate |
| Book 5 | Keeper of the Lost Cities Shannon Messenger | Level 5-6 | Mild |
| Book 6 | Nightfall Shannon Messenger | Level 5-6 | Mild |
| Book 7 | Flashback Shannon Messenger | Level 5-6 | Mild |
| Book 8 | Legacy Shannon Messenger | Level 5-6 | Mild |
| Book 9 | Stellarlune Shannon Messenger | Level 5-6 | Mild |
All Keeper of the Lost Cities Books
Keeper of the Lost Cities
Shannon Messenger
Keeper of the Lost Cities
Shannon Messenger
Exile
Shannon Messenger
Exile
Shannon Messenger
Everblaze
Shannon Messenger
Everblaze
Shannon Messenger
Neverseen
Shannon Messenger
Neverseen
Shannon Messenger
Keeper of the Lost Cities
Shannon Messenger
Keeper of the Lost Cities
Shannon Messenger
Nightfall
Shannon Messenger
Nightfall
Shannon Messenger
Flashback
Shannon Messenger
Flashback
Shannon Messenger
Legacy
Shannon Messenger
Legacy
Shannon Messenger
Stellarlune
Shannon Messenger
Stellarlune
Shannon Messenger
Questions about the Keeper of the Lost Cities series
- What reading level is the Keeper of the Lost Cities series?
- The Keeper of the Lost Cities series by Shannon Messenger is at a Grade 5.5 reading level (average Grade 5.5). Intended for Middle Grades (Ages 9–12). There are 9 books in the series.
- What order should I read the Keeper of the Lost Cities books?
- The reading-order table above lists all 9 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 Keeper of the Lost Cities series appropriate for?
- The Keeper of the Lost Cities 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.