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.

Having expanded their treehouse to an astonishing thirty-nine stories, Andy and Terry describe the invention of their "Once-Upon-a-Time machine," which they have designed to write and illustrate their stories for them.

The magic tree house carries Jack and Annie to New York City in 1938 on a mission to rescue the last unicorn. The city is in the grip of a terrible snowstorm. To stop the blizzard, Jack and Annie must save the unicorn made famous in the Cloister's medieval tapestries. But will that be enough to help a city that faces so many troubles?

Who wouldn't want to live in a treehouse? Especially a 13-story treehouse that has a bowling alley, a see-through swimming pool, a tank full of sharks, a library full of comics, a secret underground laboratory, a games room, self-making beds, vines you can swing on, a vegetable vaporiser and a marshmallow machine that follows you around and automatically shoots your favourite flavoured marshmallows into your mouth whenever it discerns you're hungry....

"Jack and Annie travel in the magic tree house to Galveston, Texas on September 8, 1900--the day of the worst natural disaster in US history"--

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.

Andy and Terry live in a 26-story treehouse. (It used to be 13 stories, but they've expanded.) It has a bumper car rink, a skate ramp, an antigravity chamber, an ice cream parlor with 78 flavors, and the Maze of Doom-a maze so complicated that nobody who has gone in has ever come out again. Well, not yet, anyway. This time, the two friends have a whole week to finish their next book, and Andy even knows what it should be about-the story of how he...

When Jack and Annie arrive at a Roman camp on a mission to learn how to be a fierce Roman warrior, their assignment is complicated by a mysterious man on a black horse.

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.

"The magic tree house whisks Jack and Annie away to Greenland where they discover they've traveled back in time to meet Lief Erikson"--