Mary Pope Osborne

Eight-year-old Jack and his younger sister Annie use the magic treehouse to travel back to the Middle Ages, where they explore a castle and are helped by a mysterious knight.

Magically transported to southwest China to find the final object needed to break the spell on the wizard Merlin's beloved penguin, Jack and Annie take a side trip to the world's largest giant panda reserve.

Jack and Annie travel back to 19th-century Ireland to inspire a young Augusta Gregory to share her love of Irish legends and folktales with the world.

Jack and Annie travel back to Victorian London when Merlin asks them to use their magic to inspire Charles Dickens to write "A Christmas Carol."

The magic tree house takes Jack and Annie to San Francisco in 1906, in time for them to experience one of the biggest earthquakes the United States had ever known.

Their magic tree house takes Jack and Annie deep into the sea, where they meet up with dolphins, sharks, and octopi as they search for the answer to an ancient riddle. Morgan le Fay will make Jack and Annie masters of the tree house if only they can solve four riddles -- which will take four books, of course! Dolphins at Daybreak begins the third set of four books in this magical (and increasingly popular) series! Jack and Annie are off in the Magic...

When Jack and Annie travel back to the Kansas prairie in search of "something to learn," they gain an understanding of how hard life was for pioneers and they experience the terror of a tornado.

Annie and Jack present information about ancient Greece and the athletic events known as the Olympic games that were held there. Annotation. What was it like to live in ancient Greece? What gods and goddesses did Greeks believe in? How did the Olympics start? What was the winner's prize? Find out the answers to these questions and many more in this Magic Tree House Research Guide. Includes fun facts from Jack and Annie, fantastic photos and illustrations,...

Presents a picture of life in colonial America and reviews the causes and major events of the American Revolution. Annotation. WHY DID WE fight the Revolutionary War? What is the Declaration of Independence? What was it like to live in the 13 colonies? Find out the answers to these questions and more in Magic Tree House Research Guide: American Revolution, Jack and Annie's guide to one of the most important events in our nation's history. This is...

The magic tree house takes Jack and Annie to Africa where they meet up with wonderful wild animals, a very hungry warrior, and where they even solve a riddle.