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

"When the magic tree house returns it whisks Jack and Annie away to the Galapagos Islands where they become World Turtle Experts and must save a tortoise in danger of an erupting volcano"-- Provided by publisher.

"Andy and Terry live in a 91-story treehouse. (It used to be a 78-story treehouse, but they keep getting ideas for more stories!) ... Good thing there's so many fun things to do in the treehouse, because Andy and Terry get stuck babysitting Mr. Big Nose's three grandchildren for the day."--Back cover.

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.

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

When Andy develops a severe toothache that prevents him from writing new jokes for their book, Terry uses their fantastical treehouse's money-making machine funds to purchase a Joke Writer 2000, with unexpected results.

"Andy and Terry live in a 169-story treehouse. (It used to be a 156-story treehouse, but they've added 13 more stories.) It now has a kangaroo-riding range, a whatever-weather-you-want dome and a hall of funhouse mirrors--the perfect place to hide from the truancy officer who is trying to catch them and make them go to school! Unfortunately, the hall of funhouse mirrors is also the place where their evil trouble-making twins, Anti-Andy, Terrible Terry...

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.

Retells, in graphic novel form, the tale of eight-year-old Jack and his younger sister Annie, who find a magic treehouse which whisks them back to an ancient time zone where they see live dinosaurs.

Their magic tree house takes Jack and Annie back to retrieve a lost story in ancient Greece, where they witness the original Olympic games and are surprised to find what girls of the time were not allowed to do.