Mary Pope Osborne

The magic tree house transports Jack and Annie to the deck of the Titanic to find a mysterious gift that will free their puppy from a terrible magic spell.

As a thank-you from Merlin and Morgan, Jack and Annie are sent on what should be a vacation at a luxurious resort in Cozumel, Mexico, but is, by mistake, an adventure with ancient Mayans, instead.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system!
It's a treasure trove of trouble! Jack and Annie are in for a high-seas adventure when the Magic Tree House whisks them back to the days of deserted islands, secret maps—and ruthless pirates! Will they discover a buried treasure? Or will they be forced to walk the plank?
Did you know that there’s a Magic...

The magic treehouse takes Jack and Annie to the Arctic, where a polar bear leads them onto very thin ice.

The #1 bestselling Magic Tree House series is ready to whisk you away through time with Jack and Annie—this time to South America!
When the magic tree house whisks Jack and Annie to a mountainside, they are surprised to find farmers nearby. Then they learn that the farmer's baby llama has been stolen, and Jack and Annie vow to bring the little animal back to its owners. But the journey is treacherous—they must climb to the peak of Machu...

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.

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 first Magic Tree House® Super Edition—and Jack and Annie’s most dangerous mission ever in the scariest time the world has ever known—World War II. With a longer story and additional facts and photographs, this is a thrilling adventure no reader will want to miss!
 
When the magic tree house takes Jack and Annie back to World War II, Europe is in trouble! It is June 1944 and the brother-and-sister...

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Getting the facts behind the fiction has never looked better.  Track the facts with Jack and Annie!!
When Jack and Annie got back from their adventure in Magic Tree House #16: Hour of the Olympics, they had lots of questions. What did the ancient Greeks wear? What did they do for fun? Where were the...

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.