On a special field trip in the magic school bus, Ms Frizzle's class learn at first hand about different kinds of rocks and the formation of the earth.

Identical twin sisters Summer and Winter live alone on a remote island, sheltered from the fallout of a mysterious event that has laid waste to the rest of the world. They survive on rations stockpiled by their father and spend their days reading and rereading their mother's collection of classic literature, until the arrival of a mysterious stranger upends their carefully constructed reality.

Forensic geologists Cassie Oldfield and Walter Shaws embark on a perilous hunt--tracking a terrorist who has stolen radioactive material that is hotter than the desert in August. He threatens to release it in America's most fragile national park, Death Valley. But first he must stop the geologists who are closing in. As the hunt turns dangerous, Cassie and Walter will need grit along with their field skills to survive this case. For they are up against...