Mary Pope Osborne

Eight-year-old Jack and his younger sister Annie find a magic treehouse, which whisks them back to an ancient time zone where they see live dinosaurs.

On Christmas Eve, Jack and Annie's tree house transports them to King Arthur's castle at Camelot, where they undertake a quest to the castle of the Otherworld.

While on a mission to prove to Merlin that they can use magic wisely, Jack and Annie travel to seventeenth-century Venice, Italy, to save the city from disaster. Merlin has asked Jack and Annie to help on another Merlin Mission. This time they head back into history to Venice, Italy, in the 1700s. With the help of some new friends, a research book, and a mysterious rhyme from Merlin, the heroes will save the beautiful city from a flood! Yet another...

The magic tree house takes Jack and Annie to Antarctica to search for the fourth secret of happiness for Merlin.

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.

Jack and Annie visit the Paris World's Fair of 1889 in an effort to protect four scientific pioneers from an evil sorcerer.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!
When Jack and Annie got back from their adventure in Magic Tree House #28: High Tide in Hawaii, they had lots of questions. What causes tsunamis? Who studies earthquakes? How do volcanoes form? What should people do if an avalanche hits? Find out the answers to these questions and more as Jack and

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Jack and Annie explore the oceans and their creatures.

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...

What was it like to be a passenger on the Mayflower? How many people survived the first harsh winter in the New World? How did Pilgrim children spend their days? Find out the answers to these questions and more in this Magic Tree House Research Guide: Pilgrims. Includes fun facts from Jack and Annie, fantastic photos and illustrations, and a guide to doing further research. From the Trade Paperback edition.