When thousands of Great White Butts attack the Earth with giant brown blobs, Zack Freeman must hitch a ride in a time-traveling buttmobile to the age of the prehistoric buttosaurs to prevent the entire world from being annihilated.
Amazon.com description: Product Description
: FOR USE IN SCHOOLS AND LIBRARIES ONLY. Zack Freeman (and his butt) have twice saved the world from total reek-dom. Now the young butt-fighter faces his nastiest challenge: Hundreds of thousands of Great White Butts attacking the earth with giant brown blobs are about to cause Buttageddon.