Blue Door Books in Order
Blue Door is a 2-book series by Julie Lundgren for ages 5–8, at a grades 1–3 reading level, with gentle content (HootRated intensity 1/5).
- Books
- 2
- By publication date
- Content intensity
- Gentle
- HootRated 1/5
Blue Door Reading Order
Series numbers aren't available for most Blue Door books, so they're listed by publication date (oldest first).
| # | Title | Reading Level | Ages | Content |
|---|---|---|---|---|
| 1 | Crazy Colors 2010 | Level 1-2 | 5-8 | Gentle |
| 2 | Everyday Electricity 2010 · Julie K Lundgren | Level 2-3 | 5-8 | Gentle |
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. Blue Door (2 books by Julie Lundgren) lands at a grades 1–3 reading level, with average content intensity 1/5. 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 Blue Door Books
Crazy Colors
Julie Lundgren
Crazy Colors
Julie Lundgren
Everyday Electricity
Julie K Lundgren
Everyday Electricity
Julie K Lundgren
Series Like Blue Door: What to Read Next
Similar reading level, content intensity and themes.
- Pebble Plus; Mighty Machines (Capstone) by Linda D. Williams 6 books · Grades 1–2 · gentle content
- TIME For Kids Science Scoops by Editors of TIME For Kids 14 books · Grades 1–4 · gentle content
- Stone Arch Readers: Level 1; Train Time by Adria F. Klein 3 books · Grades K–1 · gentle content
- Little Green Readers by Meredith Costain 17 books · Grades 1–3 · gentle content
- Father Goose: Animal Rhymes by Charles Ghigna 5 books · Grades 1–2 · gentle content
- Know Your Colors by Christianne C. Jones 3 books · Grade 2 · gentle content
Questions about the Blue Door series
- What reading level is the Blue Door series?
- Blue Door books are at a grades 1–3 reading level (average grade level 2.2), and HootRated recommends the series for ages 5–8. There are 2 books in the series.
- What order should I read the Blue Door books?
- Series numbers aren't available for most Blue Door books, so HootRated lists them by publication date: Crazy Colors (2010); Everyday Electricity (2010).
- What age is the Blue Door series appropriate for?
- HootRated recommends Blue Door for ages 5–8. Content is gentle (HootRated intensity 1/5). Intensity stays consistent across the series, so a reader who can handle the first book can generally handle the rest.