Jack and Annie join Merlin on a magical mission to a haunted castle, fight a giant sea serpent, and travel to the land of snow.

Ten-year-old Kit dreams of having a special tree house someday, but she is disappointed with the one her father and her friend build for her. Includes note on housing during the Depression and a related craft activity.

When Wendy finds a monkey in her treehouse, she tries a number of ways to rid of him.

The magic treehouse whisks Jack and Annie to the prehistoric past, the Middle Ages, ancient Egypt, and to a world of nasty pirates and buried treasure.

There's a secret tree fort and you're not invited! In this hilarious and hugely imaginative sibling story from the creator of the internationally celebrated Ike's Incredible Ink, two sisters are told to go and play outside on a beautiful day. The little sister wants them to play together - but the big sister, instead, wants to sit under a tree with a book. So the younger sister decides to tempt her with a description of her super-cool, super-secret...