The magic treehouse takes Jack and Annie to a moon base in the future where they continue to search for the fourth thing they need to free their friend Morgan from the magician's spell.

Jack and Annie look at knights, armor, and life in a castle.

Jack and Annie present information about the universe, including our solar system, and briefly describe the history of space travel and of the science of astronomy.

Describes the changing nature of weather and how meteorologists predict and study such storms as tornadoes, hurricanes, and blizzards.

Annie and Jack present information about ancient Greece and the athletic events known as the Olympic games that were held there. Annotation. What was it like to live in ancient Greece? What gods and goddesses did Greeks believe in? How did the Olympi

What was it like to be a gladiator? How many people died in the destruction of Pompeii? How did Roman children spend their days? Find out the answers to these questions and more in Magic Tree House Research Guide: Ancient Rome and Pompeii. This is the nonfiction companion to Vacation Under the Volcano (Magic Tree House #13).

Designed for younger readers, this is an informative, fact-filled guide to all kinds of natural disasters.

Jack and Annie explore the oceans and their creatures.