Amazon.com Product Description (ISBN 044041654X, Paperback)

Fourth-grade Earthling Akiko and her extraterrestrial crew are nearing the end of their mission, and there’s nothing that can stop this band of intrepid rescuers. Or is there? Akiko, Mr. Beeba, Spuckler Boach, Gax, and Poog have faced many obstacles along the way, but now they are confronted by the biggest yet: the Great Wall of Trudd. Like the Great Wall of China, only bigger, this wall stretches across the landscape—there’s no way around it, under it, or through it. So Akiko and the gang will have to find a way to go over it!