Chicago Unfolds StreetMap de VanDam Inc

East Rutherford NJ.: Perigee Books.. Circa 1989, no date found.. Wraps. Very good. No dust jacket as issued. Rubbed covers; price sticker residue. Otherwise fine.. 1 Trade paperback (US). Glued binding. Audience: General/trade. 'Batwing' unfolding city street maps, 1980s; patented kinetic sculpture. Two detailed 13x16.75 inches scaled maps housed in sturdy glossy 5x9in lift-up w/ stapled binding. Inovative, handy, durable. At center, 8-page street index plus National 800-number directory. Stephan Van Dam, cartographer, creator, and multiple patent holder has a permanent unfolding map at the Museum of Modern Art in NYC. His early maps are collectible; later unfold products are smaller in dimension and of different materials.