Time Travel Quartet Books in Order
3 books by Caroline B. Cooney. Reading level: Grades 5.2–5.7. Upper Grades (Ages 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. Time Travel Quartet (3 books by Caroline B. Cooney) lands at reading level Grades 5.2–5.7, with average content intensity 2.7/5. Content intensity edges up across the run; the last few books carry heavier themes than the first.
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
Gradual EscalationContent gradually intensifies from Mild to Intense.
Time Travel Quartet Reading Order
| # | Title | Reading Level | Content |
|---|---|---|---|
| 1 | Both sides of time Caroline B. Cooney | Level 5-6 | Mild |
| 2 | For all time Caroline B. Cooney | Level 5-6 | Mild |
| 3 | Out of time Caroline B. Cooney | Level 5-6 | Intense |
All Time Travel Quartet Books
Questions about the Time Travel Quartet series
- What reading level is the Time Travel Quartet series?
- The Time Travel Quartet series by Caroline B. Cooney is at a Grades 5.2–5.7 reading level (average Grade 5.4). Intended for Upper Grades (Ages 12+). There are 3 books in the series.
- What order should I read the Time Travel Quartet books?
- The reading-order table above lists all 3 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 Time Travel Quartet series appropriate for?
- The Time Travel Quartet series is recommended for Upper Grades (Ages 12+). The average content intensity is 2.7/5. 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.