Imaginary worlds, impossible stairways, paradoxical haliways, enigmatic patterns, and mind-boggling graphics are the trademarks of M.C. Escher's artwork. His two-dimensional drawings bring to life a fourth dimension where the surfaces of things come together like a Mobius strip. The profoundly original work of Escher has inspired countless artists, designers, and filmmakers and can be considered a genre in itself. This guide provides a mind-bending introduction to the great master's work.