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Casa del árbol; Magic Tree House: Merlin Missions Books in Order

Casa del árbol; Magic Tree House: Merlin Missions is a 5-book series by Mary Pope Osborne for ages 5–8, at a grades 3–4 reading level, with gentle to mild content (HootRated intensity 1–2 out of 5).

Books
5
By publication date
Reading level
Grades 3–4
Average grade level 3.3
Recommended ages
Ages 5–8
From HootRated age ratings
Content intensity
Gentle to mild
HootRated 1–2 out of 5 · avg 1.6

Casa del árbol; Magic Tree House: Merlin Missions Reading Order

Series numbers aren't available for most Casa del árbol; Magic Tree House: Merlin Missions books, so they're listed by publication date (oldest first).

# Title Reading Level Ages Content
1 Carnaval a media luz
2016
Level 3-4 5-8 Mild
2 El verano de la serpiente marina
2016
Level 3-4 5-8 Gentle
3 La estación de las tormentas de arena
2016
Level 3-4 5-8 Mild
4 La noche de los nuevos magos
2016
Level 3-4 5-8 Gentle
5 El invierno del hechicero del hielo Level 3-4 5-8 Mild

Content Intensity Across the Series

Consistent

Content stays at a steady intensity level throughout the series.

1
2
3
4
5
First book Latest book

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. Casa del árbol; Magic Tree House: Merlin Missions (5 books by Mary Pope Osborne) lands at a grades 3–4 reading level, with average content intensity 1.6/5. 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 Casa del árbol; Magic Tree House: Merlin Missions Books

Carnaval a media luz

Mary Pope Osborne

Cover of Carnaval a media luz

Carnaval a media luz

Mary Pope Osborne

Level 3-4

El verano de la serpiente marina

Mary Pope Osborne

Cover of El verano de la serpiente marina

El verano de la serpiente marina

Mary Pope Osborne

Level 3-4

La estación de las tormentas de arena

Mary Pope Osborne

Cover of La estación de las tormentas de arena

La estación de las tormentas de arena

Mary Pope Osborne

Level 3-4

La noche de los nuevos magos

Mary Pope Osborne

Cover of La noche de los nuevos magos

La noche de los nuevos magos

Mary Pope Osborne

Level 3-4

El invierno del hechicero del hielo

Cover of El invierno del hechicero del hielo

El invierno del hechicero del hielo

Level 3-4

Similar reading level, content intensity and themes.

Enjoy This Series in Other Languages

5 editions available in other languages.

es Spanish (5)

Carnaval a media luz

Mary Pope Osborne

Cover of Carnaval a media luz

Carnaval a media luz

Mary Pope Osborne

Level 3-4

El invierno del hechicero del hielo

Cover of El invierno del hechicero del hielo

El invierno del hechicero del hielo

Level 3-4

El verano de la serpiente marina

Mary Pope Osborne

Cover of El verano de la serpiente marina

El verano de la serpiente marina

Mary Pope Osborne

Level 3-4

La estación de las tormentas de arena

Mary Pope Osborne

Cover of La estación de las tormentas de arena

La estación de las tormentas de arena

Mary Pope Osborne

Level 3-4

La noche de los nuevos magos

Mary Pope Osborne

Cover of La noche de los nuevos magos

La noche de los nuevos magos

Mary Pope Osborne

Level 3-4

Questions about the Casa del árbol; Magic Tree House: Merlin Missions series

What reading level is the Casa del árbol; Magic Tree House: Merlin Missions series?
Casa del árbol; Magic Tree House: Merlin Missions books are at a grades 3–4 reading level (average grade level 3.3), and HootRated recommends the series for ages 5–8. There are 5 books in the series.
What order should I read the Casa del árbol; Magic Tree House: Merlin Missions books?
Series numbers aren't available for most Casa del árbol; Magic Tree House: Merlin Missions books, so HootRated lists them by publication date: Carnaval a media luz (2016); El verano de la serpiente marina (2016); La estación de las tormentas de arena (2016); La noche de los nuevos magos (2016); El invierno del hechicero del hielo.
What age is the Casa del árbol; Magic Tree House: Merlin Missions series appropriate for?
HootRated recommends Casa del árbol; Magic Tree House: Merlin Missions for ages 5–8. Content is gentle to mild (HootRated intensity 1–2 out of 5). Intensity stays consistent across the series, so a reader who can handle the first book can generally handle the rest.