onwards, and so a Prolog programmer does not need to read Chapters 1 and 2, which are oriented more to teachers and to students, respec­ tively. The book is recommended for introductory and advanced university courses, where students may need to remember the basics about logic program­ ming and Prolog, before starting doing. Chapters 1 and 2 were also kept for the sake of unity of the whole material. In Chapter 1 a teaching strategy is explained based on the key concepts of Pro­ log which are novel aspects of programming. Prolog is enhanced as a computer programming language used for solving problems that involve objects and the relationships between objects. This chapter provides a pedagogical tour of pre­ scriptions for the organization of Prolog programs, by pointing out the main draw­ backs novices may encounter.