The question "What is justice?", which is contained in the title of the book, is very old. It has occupied the minds of theorists and philosophers of law from ancient times to the present day. We could say that it is a question analogous to that posed by Pontius Pilate to Jesus Christ at the Praetorium: "What is truth?"

However, with this book, the purpose is not to continue the search for an answer, which may not even exist. The author's aim is much simpler: It consists of an effort to bring law and legal science closer to the ordinary citizen. To take law from the level of theory and bring it down to the reality of everyday life, to make clear to the layperson what the rules of law mean and how they are applied every day to a multitude of issues (commercial, economic, family, inheritance, etc.) that arise from people's coexistence in a community.

Although law is directly and inseparably linked to the daily life of humans, it does not attract interest and trust to the same extent as other social and political sciences, such as history, sociology, philology, art history, etc. With the ambition to reverse this image, the author tries as simply as possible and using many examples, to open for the non-lawyer a window into the "paradise" of legal concepts.

To explain the functioning of many institutions, to simplify as much as possible legal constructs that may seem unclear, and to make it clear that the legislator may sometimes (or at times) overindulge in the production of laws, but generally does not act arbitrarily! Behind every legislative regulation lies the effort to solve everyday life problems and to manage conflicting interests of the members of society.