Twelve-year-old Chase and his friend Nicole Rossi attempt to rescue the Rossi Brothers' Circus--lions, tigers, elephants, and all--in Mexico, where a massive earthquake has struck, leading to the imminent eruption of a volcano.

Eleven year-old superhero Wyatt Flynn and his little sister Adeline go to Camp Igneous, where they secretly explore a mysterious volcano which may be a key piece in the puzzle of what happened to their missing mother.

Brianna Dobson has been chosen to work with world-renowned geologist Dr. Grier in Yellowstone National Park for the summer, and she couldn't be more excited! But then Dr. Grier tells her and the other kids on the project the real reason she's invited them to Yellowstone: A massive supervolcano in the park is about to erupt-and if they can't stop it, Earth will be plunged into an endless winter, and civilization will be destroyed. Bri and her new...