A wonderful, short book of the rules (κανών: kanón, meaning a rule) of design chosen and illustrated by Massimo Vignelli and his wife Lella. Download it here.
I have always said that there are three aspects in Design that are important to me: Semantic, Syntactic and Pragmatic.
That is: the meaning of the design, the details that convey the meaning and the usefulness of the design.
Vignelli’s work is the best advertisement for his canon. An astonishing œuvre that has immensely enriched the language of visual expression and made many difficult things simple and useful.
Much more here… Vingelli.com