Kristen Rajczak Nelson 
Terrifying Tornadoes [PDF ebook] 

The terrible damage caused by tornadoes has been a focus of many newspapers and TV news programs. Tornadoes strike quickly, violently, and almost everywhere on Earth. The United States has more tornadoes each year than any other country. One part of the nation experiences tornadoes so often it’s called Tornado Alley. In this book, readers will learn how tornadoes are formed and what to do when a tornado warning is issued. They’ll see astonishing photographs of twisters and the destruction that these terrifying winds can cause.