More than six months after the eruption of the Yellowstone supervolcano, Alex and Darla retrace their steps to Iowa hoping to find Alex's parents and bring them to the tenuous safety of Illinois, but the journey is ever more perilous as the remaining communities fight to the death for food and power.

On May 18, 1980, eleven-year-old Jessie Marlowe and her best friends, Eddie and Sam, are in a forest near Mount St. Helens when the months of wondering whether the volcano will erupt are finally answered--all three are badly burned, but it is up to Jessieto protect the boys as best she can and hope that somebody comes to rescue them.

Emmy the dragon is maturing and growing too large--and bored--for her quarters, but when she disappears her Keepers, cousins Jesse and Daisy, follow her trail to the Fiery Realm in hopes of bringing her home.

Beth and Eugene look for a way to save Patrick after he takes a trip alone in the Imagination Station and becomes stuck in ancient Pompeii right before Vesuvius erupts.

After the eruption of the Yellowstone supervolcano destroys his city and its surroundings, fifteen-year-old Alex must journey from Cedar Falls, Iowa, to Illinois to find his parents and sister, trying to survive in a transformed landscape and a new society in which all the old rules of living have vanished.

Why does a volcano erupt? How many different kinds of volcanoes are there? Once believed to be the work of a fire god named Vulcan, volcanoes have long fascinated people. Looking at three different types of volcanoes-composite, cinder cone, and shield-uncover how and why these magnificent and deadly mountains change the earth for the better, and for the worse.