Early prints: Tower of Babel -- Castrovalva -- Palm -- Portrait G.A. Escher -- Fluorescent sea -- St. Peter, Rome -- Dream -- Regular division of a plane: Swans -- Horsemen -- two intersecting planes -- Day and night -- Sun and moon -- Sky and water I -- Sky and water II -- Liberation -- Development I -- Verbum -- Sphere surface with fishes --Path of life II -- Smaller and smaller -- Whirlpools -- Circle limit I -- Square limit -- Circle limit III -- Circle limit IV -- Fishes and scales -- Butterflies -- Reptiles -- Cycle -- Encounter -- Magic mirror -- Metamorphose -- Predestination -- Mosaic I -- Mosaic II -- Unlimited spaces: Depth -- Cubic space division -- Three intersecting planes -- Spatial rings and spirals: Knots -- Moebius band II -- Concentric rinds -- Spirals -- Sphere spirals -- Moebius band I -- Rind -- Bond of union -- Mirror images: Rippled surface -- Puddle -- Three worlds -- Still life with reflecting globe -- Hand with reflecting globe -- Three spheres II -- Dewdrop -- Eye -- Inversion: Cube with magic ribbons -- Concave and convex -- Polyhedrons: Double planetoid -- Tetrahedral planetoid -- Order and chaos -- Gravitation -- Stars -- Flat worms -- Relativities: Another world II -- High and low -- Curl-up -- House of stairs -- Relativity -- Conflict flat-spatial: Three spheres I -- Drawing hands -- Balcony -- Doric columns -- Pint gallery -- Dragon -- Impossible buildings: Belvedere -- Ascending and descending -- Waterfall