Prolog programming and applications

from the back cover:"The recent commercial and educational success of Prolog has come as no surprise to those who have worked for some years with the language. It is like no other computer language because it allows the programmer to describe a proble to the computer system in a direct, logical and declarative manner. The apparent simplicity of the syntax conceals a great power and versatility which allows the representation of knowledge, the processing of natural language, rapid prototyping of applications and completely flexible data structures. In no other language do the design of a system and its programming combine so closely."