This is the 1st Avon printing.<br/>Cover Artist: Daniel Mroz<br/><br/>Trurl and Klaupacius are constructor robots who try to out-invent each other. They travel to the far corners of the cosmos to take on freelance problem-solving jobs, with dire consequences for their employers. “The most completely successful of his books... here Lem comes closest to inventing a real universe” (Boston Globe). Illustrations by Daniel Mr—z. Translated by Michael Kandel.