22 books • 15 series
Tsunamis (High Interest Books: Natural Disasters (Paperback)) (High Interest Books: Natural Disasters (Hardcover))
Floods (High Interest Books: Natural Disasters (Hardcover)) (High Interest Books: Natural Disasters (Paperback))
Hurricanes (High Interest Books: Natural Disasters (Hardcover)) (High Interest Books: Natural Disasters (Paperback))
The Transcontinental Railroad (High Interest Books: Trailblazers of the West (Paperback))
Sahara: El Desierto Más Grande del Mundo (the Sahara: World's Largest Desert) (Maravillas Naturales)
Bomb Squad Specialist (High Interest Books: Danger Is My Business (Paperback)) (High Interest Books: Danger Is My Business (Hardcover))