Will Mount St. Helens erupt again? Will it spit lava or unleash a deadly mudflow? Learn how to be a volcano detective, sifting through the evidence, searching for clues, and solving real-life cases. This classroom favorite has won numerous awards, including being named a Washington Reads pick, a Natural History magazine Best Book for Young Readers, and an Oregon Book Award finalist.

Featuring new cover art, the updated edition of this award-winning book explores the science behind the volcano's eruptions and shows children how to do their own sleuthing to determine when and if the volcano will blow again.