While time-traveling brother and sister team Jack and Annie journey to a village in the mountains of southeast China, they find they have arrived on the day of a historic earthquake.

Jack and Annie travel in their magic tree house to the land of the mystical selkies to seek a magical sword for Merlinches.

Guided by a magic rhyme, Jack and Annie travel to ancient Baghdad on a mission to help the Caliph disseminate wisdom to the world.

When Merlin is weighed down by sorrows, Jack and Annie travel back to feudal Japan to learn one of the four secrets of happiness.

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.

Jack and Annie travel in their Magic Tree House back to a Hawaiian island of long ago where they make friends, learn how to surf, and encounter a tsunami.

Jack and Annie search for the fourth secret of greatness for Merlin the Magician in Mexico City at the 1970 World Cup Games where they hope to learn something new from soccer player great Pele.

Jack and Annie travel back to nineteenth-century Ireland to inspire a young Augusta Gregory to share her love of Irish legends and folktales with the world.

Jack and Annie experience a series of time-travel adventures. (Dolphins at daybreak) It's sink or swim for Jack and Annie when the magic tree house whisks them off to the middle of the ocean. (Ghost town at sundown) "Is this town haunted?" Jack and Annie wonder when the magic tree house takes them to the Wild Wild West. (Lions at lunchtime) "Where are the lions?" Jack wonders when the magic tree house whisks him and his sister to the vast plains of...

Introduces readers to classic Welsh legends as Jack and Annie return to Camelot to assist King Arthur, Merlin, and the Knights of the Round Table.