What causes the earth's weather? How do twisters form? What are the deadliest storms on earth? Find out the answers to these questions and more in Magic Tree House Research Guide: Twisters and Other Terrible Storms, Jack and Annie's g...

What were pirates really like? How did people become pirates? Where did pirates bury their treasure?Dig up the answers to these questions and more in Magic Tree House Research Guide #4: Pirates, Jack and Annie's very own guide to pira...