In the summer of 1937, Walter Gropius, founder of the Bauhaus, rented a house on Planting Island, near the base of Cape Cod. Thus began a chapter in the history of modern architecture that has never been told _until now. The area was a hotbed of intellectual currents from New York, Boston, Cambridge and the country's top schools of architecture and design. Avant-garde homes began to appear in the woods and on the dunes; by the 1970s, there were about...