Magic Tree House

#4 Pirates Past Noon by Mary Pope Osborne, 1994.

One rainy afternoon, Annie urges Jack to go to the tree house with her because she has a feeling that they will soon meet its mysterious owner.  When they arrive, no one is there, so the kids start looking at the books.  The day is cold and wet, and Annie shows Jack a picture of a sunny beach, saying that she wishes they were there.  Soon, they find themselves on the beach. 

They have fun at first, but then some pirates come to the beach, looking for a treasure buried by Captain Kidd.  The evil pirate, Cap’n Bones, makes the kids prisoners aboard his ship until they figure out where the treasure is hidden from the clue written on the captain’s map.

The clue says that the treasure is hidden underneath the whale’s eye, and from the ship, Jack and Annie realize that the island is shaped like a whale with a big boulder for its eye.  The kids make the pirate captain take them back to the island in exchange for telling him where the treasure is.  While the pirates are digging for the treasure, a parrot flies over, saying, “Go back!”  The pirates take that as a sign of an approaching storm and flee, leaving the kids behind. 

A storm does come, but Jack still has difficultly tearing himself away from the treasure that they’ve uncovered.  Finally, the parrot convinces him to leave, and he and Annie use the tree house to go home again. 

Once they’re back in Pennsylvania, the parrot appears and turns into a woman and says that she’s Morgan le Fay.  She is the owner of the tree house and the amulet.  Besides being King Arthur’s sister and an enchantress, she is also the librarian of Camelot.  She has been using the tree house to travel to other times to collect books that the scribes in Camelot can copy for their library.  She put the spell on the tree house so that she can travel to some of the places in the books herself.  The kids can use the spell only because Annie truly believes in magic and Jack really loves books.  She and the tree house disappear as the kids head home, but Jack discovers that she left her amulet with him as a sign that she will come back.

I was surprised that the owner of the tree house turned out to be Morgan le Fay, both because an Arthurian character didn’t seem to quite fit with a magical children’s tree house and because Morgan le Fay wasn’t one of the good characters in the Arthurian legends. The exact nature of the character of Morgan le Fay changed through different retellings of the Arthurian legends, and she wasn’t always an adversary or villain, but she does do things in some of the stories that wouldn’t make her a good heroine for children’s literature. However, none of that matters in this series because, here, she’s just an enchantress from Camelot who is interested in books.

The book is currently available online through Internet Archive.