Mark J. Harasymiw 
Chasing a Tornado [PDF ebook] 

Natural disasters like tornadoes destroy, devastate, and alter people’s lives forever. Some people chase tornadoes for scientific purposes, while others just want the thrill of facing a twister’s dangers. In this book, readers are introduced to the science behind tornadoes and to the people who have risked their lives to help us understand more about them. Graphic organizers and incredible photographs add to this glimpse into one of nature’s most terrifying events.