"A woman once rang me up and said，'Mr. Escher，I am absolutely crazy about your work. In your print Reptiles you have given such a striking illustration of reincarnation.' I replied，Madame，if that's the way you see it，so be it.'" An engagingly sly comment by the renowned Dutch graphic artist Maurits Cornelis Escher (1898-1972)--the complex ambiguities of whose work leave hasty or single-minded interpretations far behind. Long before the first computer-generated 3-D images were thrilling the public，Escher was a master of the third dimension.