In their magic treehouse, Jack and Annie are again transported to King Arthur's realm, where invisible beings, giant ravens, and mistaken magic spells have a duke's castle in an uproar on Halloween night.

Presents a picture of life in colonial America and reviews the causes and major events of the American Revolution.

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

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. Merlin has asked Jack and Annie to help on another Merlin Mission. This time they head back into history to Venice, Italy, in the 1700s. With the help of some new friends, a research book, and a mysterious rhyme from Merlin, the heroes will save the beautiful city from a flood! Yet another...

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

The magic tree house carries Jack and Annie to New York City in 1938 on a mission to rescue the last unicorn.

What was it like to be a passenger on the Mayflower? How many people survived the first harsh winter in the New World? How did Pilgrim children spend their days? Find out the answers to these questions and more in this Magic Tree House Research Guide: Pilgrims. Includes fun facts from Jack and Annie, fantastic photos and illustrations, and a guide to doing further research. From the Trade Paperback edition.

Jack and Annie travel 500 years back in time to Florence, Italy, and spend a day helping Leonardo da Vinci in the hope of learning another secret of happiness.

What are the warning signs that a tsunami is on the way? Can scientists predict earthquakes? How do volcanoes form? Find out the answers to these questions and more in Magic Tree House Research Guide: Tsunamis and Other Natural Disasters, Jack and Annie's guide to geological disasters.