Professor Wormbog has collected a Kerploppus, an Ickky, a Murgatroy, and a Useless. He has every beastie from A to Y, but he doesn't have a Zipperump-a-Zoo. He looks underground, in the sea, and in the air, and discovers how hard it is to find one--unless the Zipperump-a-Zoo wants to find you! Mercer Mayer creates a world of silly creatures filled with humor for adults and children alike.