Mary Pope Osborne

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

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

Includes brand-new full color illustrations! Celebrate Christmas with Jack, Annie, and the Magic Tree House with this oversized, gorgeously illustrated deluxe holiday edition from the #1 bestselling chapter book series. When Jack and Annie receive an invitation to spend Christmas Eve in Camelot--a magical place that exists only in myth and fantasy--they know they are in for their biggest adventure yet. What they don't know is that the invitation will...

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 500 years back in time to Florence, Italy, and spend a day helping Leonardo da Vinci in the hope of learning another secret of happiness.

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.

The magic tree house whisks Jack and Annie back to the days of deserted islands, secret maps, hidden gold, and nasty pirates.

"Jack and Annie hear the cry of a golden eagle when the magic tree house spins them back in time to a nature reserve for horses! As Eco-Volunteers, Jack and Annie find themselves alone in Mongolia, on a plain in the middle of the night. Under the light of a full moon, they ride mountain bikes across the land, summon a mysterious helper, and try desperately to save wild horses whose very existence is in danger."-- Provided by publisher.

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.

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