Mary Pope Osborne

The magic treehouse takes Jack and Annie back two thousand years to ancient China where they must find the original copy of an old legend before the Imperial Library is burned down by the evil Dragon King.

Using their magic tree house, Jack and Annie travel back to the time of the American Revolution and help General George Washington during his famous crossing of the Delaware River.

Annie and Jack present information about ancient Greece and the athletic events known as the Olympic games that were held there.

Jack and Annie travel in their magic tree house to Elizabethan London, where they become actors in a production of A Midsummer Night's Dream and try to rescue a tame bear.

Jack and Annie travel to a monastery in the Swiss Alps where, with the help of St. Bernard dogs and magic, they seek the second of four special objects necessary to break the spell on the wizard Merlin's beloved penguin, Penny.

The magic tree house whisks Jack and Annie away to Australia where they must save some animals from a wildfire.

The adventures that started it all! Newly bound together, the first four books of the fan-favorite chapter-book series are the perfect introduction to the New York Times bestselling Magic Tree House series. Parents, teachers, and librarians hail the series as a tool to promote reading, as even the most reluctant readers want to know where the Magic Tree House will take the brother-and-sister team next.
The story begins with Dinosaurs...

Describes what it was like to be a passenger on the Mayflower, how the Pilgrims survived in the New World, and how the children spent their days.

The magic tree house takes Jack and Annie to an African rainforest, where the siblings encounter gorillas and learn to communicate with them.