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

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

Books
2
By publication date
Reading level
Grades 3–4
Average grade level 3.5
Recommended ages
Ages 5–8
From HootRated age ratings
Content intensity
Gentle to moderate
HootRated 1–3 out of 5 · avg 2

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

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

# Title Reading Level Ages Content
1 Buena noche para fantasmas
2019
Level 3-4 5-8 Moderate
2 Luz de luna sobre la flauta mágica Level 3-4 5-8 Gentle

Content Intensity Across the Series

Varies

Content intensity ranges from Gentle to Moderate across the series.

1
2
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: Mision Merlin; Magic Tree House; Magic Tree House: Merlin Missions (2 books by Mary Pope Osborne) lands at a grades 3–4 reading level, with average content intensity 2/5. Intensity varies from book to book, so check individual ratings in the list above.

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: Mision Merlin; Magic Tree House; Magic Tree House: Merlin Missions Books

Buena noche para fantasmas

Mary Pope Osborne

Cover of Buena noche para fantasmas

Buena noche para fantasmas

Mary Pope Osborne

Level 3-4

Luz de luna sobre la flauta mágica

Cover of Luz de luna sobre la flauta mágica

Luz de luna sobre la flauta mágica

Level 3-4

Similar reading level, content intensity and themes.

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

What reading level is the Casa del árbol: Mision Merlin; Magic Tree House; Magic Tree House: Merlin Missions series?
Casa del árbol: Mision Merlin; Magic Tree House; Magic Tree House: Merlin Missions books are at a grades 3–4 reading level (average grade level 3.5), and HootRated recommends the series for ages 5–8. There are 2 books in the series.
What order should I read the Casa del árbol: Mision Merlin; Magic Tree House; Magic Tree House: Merlin Missions books?
Series numbers aren't available for most Casa del árbol: Mision Merlin; Magic Tree House; Magic Tree House: Merlin Missions books, so HootRated lists them by publication date: Buena noche para fantasmas (2019); Luz de luna sobre la flauta mágica.
What age is the Casa del árbol: Mision Merlin; Magic Tree House; Magic Tree House: Merlin Missions series appropriate for?
HootRated recommends Casa del árbol: Mision Merlin; Magic Tree House; Magic Tree House: Merlin Missions for ages 5–8. Content is gentle to moderate (HootRated intensity 1–3 out of 5). Intensity varies from book to book, so check individual ratings in the list above.