Ivy and Gracie's fifth grade class is supposed to be going on a field trip to a museum, but the bus that picks them up, driven by a shadowy figure that nobody can quite see sitting behind a plastic wall, makes one detour due to construction, and then another, and suddenly the bus is accelerating and taking the children on a ride to destruction.

"A 4D book." "See a video interview with the author and discover more titles in the series when you scan the book with the free Capstone 4D augmented reality app."--Publisher.