Arnold has swallowed the Magic School Bus! Now, instead of seeing an exhibit of the human body at a museum, the class is taking a look from the inside at Arnold's stomach, his intestines, his bloodstream, and more on this heart-stopping field trip.

Cassandra Morris lives in Los Angeles and has received critical acclaim for her voice-over work from Publishers Weekly and AudioFile magazine, and was the narrator on the 2015 Odyssey Honor title and Audie Award finalist A Snicker of Magic. To date, she has narrated over a hundred audiobooks.
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.
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.