Rock collecting has never been quite like this! When the class forgets to do its homework, a fieldtrip through the Earth's crust, into the center of the Earth, and out through a volcano will teach them not to forget their assignments again.

Joanna Cole has been creating books about the Magic School Bus for more than twenty years. She is a recipient of many awards, most recently the National Endowment for the Arts Foundation Award for Outstanding Service to Public Education. She lives in Key West, with her husband.
Bruce Degen is the bestselling author and illustrator of the beloved, perennial favorite Jamberry and numerous award-winning books for children. He is also the illustrator of the highly-acclaimed Magic School Bus series by Joanna Cole.