An account of the work of volcanologists Andy Lockhart, John Pallister, and their team describes their life-risking efforts to investigate dangerous volcanoes that pose threats to more than one billion people worldwide. Photographs and text share an account of volcanologists Andy Lockhart, John Pallister, and their group of scientists who risk their lives investigating deadly volcanoes that remain constant threats to people around the world.

Sleeping giant -- Never again -- Mount Pinatubo -- To evacuate or not to evacuate? -- Volcano training camp -- How do you watch a volcano you can't see? -- Mount Merapi's next move -- The mystery of the missing ash -- What happened here? -- Living and working in the shadow of a volcano -- Volcanic vocabulary.