DISCOVERY OF THE SQUARE by Bruno Munari

George Wittenborn, Inc. 1970 Second printing, 85 pp., 6" X 6" Softcover

Very good 

Square has much importance in man's life: a lot of churches, monuments, games (like chess), fonts is square-based. But man seems not to realize it... one more time Bruno Munari amazes us with an historical, anthropological, scientific square book.