Carl Menger is considered the father of the Austrian School of Economics. His pioneering work, "Principles of Economics," published in 1871, not only introduced the concept of marginal analysis but also presented a radically new approach to economic analysis, which remains the core of Austrian theory of value and prices. For the beginner, "Principles of Economics" remains an excellent introduction to economic reasoning, and for the expert, it is the classic demonstration of the fundamental principles of the Austrian School. Despite its solid economic content, this work is extremely comprehensible even for readers not specialized in economics. This is due to the author's crystal-clear reasoning, always accompanied by numerous and didactic examples.