This companion to "Twister on Tuesday" explains in simple terms what causes severe weather that leads to the formation of tornados. Includes photos, definitions, an index, and information forecasting the weather.

This companion to "Twister on Tuesday" explains in simple terms what causes severe weather that leads to the formation of tornados. Includes photos, definitions, an index, and information forecasting the weather.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system

When Jack and Annie got back from their adventure in * Magic Tree House #23: Twister on Tuesday,*they had lots of questions. How do tornadoes form? What kinds of tools can help predict bad storms? Where did the biggest snowfall on record happen? How fast are hurricane winds? Did you know that there's a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books

Merlin Missions: More challenging adventures for the experienced reader

Super Edition: A longer and more dangerous adventureFact Trackers: Nonfiction companions to your favorite Magic Tree House adventures Have more fun with Jack and Annie at MagicTreeHouse.com