Mount St. Helens is a master of disguises, adept at sending out false clues. Can anyone figure out what's going on with this active volcano in Washington State? This illustrated book presents a wealth of easily digested information covering underground gases, earthquakes, infrared measurements, bumps on earth's surface, and other factors to help the budding Sherlock Holmes crack the case. With sidebars about the latest gadgets and gizmos, youngsters learn about volcanology while having fun.Rusch, Elizabeth is the author of 'Will It Blow? Become a Volcano Detective at Mount St. Helens', published 2007 under ISBN 9781570615108 and ISBN 1570615101.