21 books in series
Magic Tree House "Merlin Missions"
Magic Tree House "Merlin Missions" is a 21-book series with 21 primary works first released in 2001 with contributions by Mary Pope Osborne.
| #1 |  Christmas in Camelot
| 4 | 10 reads | ||
| #2 |  Haunted castle on Hallows Eve
| 3.67 | 6 reads | ||
| #3 |  Summer of the sea serpent
| 4 | 8 reads | ||
| #4 |  Winter of the ice wizard
| 3.75 | 8 reads | ||
| #5 |  Carnival at candlelight
| 3.71 | 10 reads | ||
| #6 |  Season of the sandstorms
| 4 | 6 reads | ||
| #7 |  Night of the New Magicians
| 3.75 | 7 reads | ||
| #9 |  Dragon of the Red Dawn
| 3.67 | 5 reads | ||
| #10 |  Monday with a Mad Genius
| 4 | 5 reads | ||
| #11 |  Dark Day in the Deep Sea
| 4.17 | 9 reads | ||
| #12 |  Eve of the Emperor Penguin
| 4 | 6 reads | ||
| #13 |  Moonlight on the Magic Flute
| 4 | 6 reads | ||
| #17 |  A Crazy Day wth Cobras
| 3 | 2 reads | ||
| #18 |  Dogs in the dead of night
| 3 | 2 reads | ||
| #19 |  Abe Lincoln at Last!
| 0 | 0 reads | ||
| #20 |  A Perfect Time for Pandas A Perfect Time for Pandas
| 0 | 0 reads | ||
| #21 |  Stallion by Starlight
| 4 | 2 reads | ||
| #22 |  Hurry Up, Houdini!
| 0 | 0 reads | ||
| #24 |  Soccer on Sunday
| 4.5 | 3 reads | ||
| #25 |  Shadow of the Shark
| 0 | 0 reads | ||
| #26 |  Balto of the Blue Dawn
| 3 | 1 read |