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

Their magic tree house takes Jack and Annie deep into the sea, where they meet up with dolphins, sharks, and octopi as they search for the answer to an ancient riddle.

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.

When Jack and Annie travel back to the Kansas prairie in search of "something to learn," they gain an understanding of how hard life was for pioneers and they experience the terror of a tornado.

When Big Anthony borrows Strega Nona's magic ring to turn himself into a handsome man, he gets more trouble than fun.

Gwendolen Chant and her brother Cat find the Chrestomancie Castle family's magic powers difficult to counter with the inferior powers of the Coven Street witches.

Cyrgon's hired minions have kidnapped Sparhawk's wife Queen Ehlana demanding he surrender Bhelliom or she will die.

When Merlin is weighed down by sorrows, the enchantress Morgan asks Jack and Annie of Frog Creek, Pennsylvania, to use their tree house to travel to a land of fierce samurai and great beauty, in the capital city of Edo (now the city of Tokyo) in old Japan in the 1600s to learn one of the four secrets of happiness.

With the defenses of Winding Circle Temple seriously weakened by an earthquake, Tris and her fellow mages-in-training try to join their different magic powers to protect the Winding Circle community from a pirate attack.

Former "street rat" Briar Moss must face his past when he discovers a young mage in need of a mentor.