The first major work in the nascent discipline of ``cognitive science.'' It provides a unified presentation of pattern recognition that introduces new mechanical methods as well as a wider humanistic perspective on the science. Showing that practically all the known pattern recognition algorithms can be derived from the principle of minimum entropy, it provides the first complete theory of pattern recognition.
A bit convoluted, but enlightening. Fundamental is the theorem of the ugly duckling - basically that the concept of a similarity measure MUST be subjectively constructed.