This series takes readers behind the scenes of some of the world's worst spills, fires, and explosions. Readers learn the causes and impacts of each type of disaster, as well as how people are working to prevent future damage. Each book pairs short paragraphs of easy-to-read-text with plentiful photos and includes a table of contents, fast facts, sidebars, comprehension questions, a glossary, an index, and a list of resources for further reading. Apex books have low reading levels (grades 2-3) but are designed for older students, with interest levels of grades 3-7.