The book "Principles of Economic Theory" is primarily aimed at students of the 3rd grade of high school who have chosen the subject of Economic Theory as a major subject for their introduction to Higher Education. Its goal is to help them understand the theory and familiarize themselves with the methodology of exercises. In other words, to practice the way in which the analytical tools provided by the theory can be used to analyze specific problems, economic phenomena, and exercises.
It is also addressed to fellow educators, whom we believe will find rich material of theory, questions, and exercises tailored to the requirements of exams. [...] (from the author's preface)