This book is suitable for ages 7 to 14 years. Each book explains the science behind the forces in nature as well as man-made forces that create catastrophic events. Ages Set includes: "Avalanche & Landslide Alert!"; "Drought & Heatwave Alert!"; "Earthquake Alert!"; "Environmental Disaster Alert!"; "Flood & Monsoon Alert!"; "Global Warming Alert!"; "Hurricane & Typhoon Alert!"; "Hurricane Katrina"; "Ocean Storm Alert!"; "Plague & Pandemic Alert!"; "Severe Storm & Blizzard Alert!"; "Space Disaster & Meteorite Alert!"; "Terrorism Alert!"; "Tornado Alert!"; "Transportation Disaster Alert!"; "Tsunami Alert!"; "Volcano Alert!"; and, "Wildfire Alert!"