The book "Fundamentals of the theory of fuzzy sets and fuzzy logic: a textbook" by Vladimir Vasilyevich Rybin is a unique publication that immerses the reader in the fascinating world of fuzzy logic and fuzzy sets theory. This work will become an indispensable assistant for students, graduate students and anyone interested in mathematics, computer science, as well as applied sciences related to the processing of fuzzy information. In his book, Rybin masterfully explains the basic concepts and principles of fuzzy logic, which, unlike traditional binary logic, allows you to work with uncertainty and approximate values. This is especially true in the modern world, where many processes and phenomena cannot be described with the help of clear categories. The book covers a wide range of topics, including the definition of fuzzy sets, operations on them, as well as the application of fuzzy logic in various fields, such as artificial intelligence, management, economics and sociology. The reader will find in this manual not only theoretical foundations, but also practical examples that will help to better understand how to apply fuzzy logic to real-world problems. Rybin gives many illustrations and graphs, which makes the material more accessible and visual. This is especially important for those who are just starting to get acquainted with this topic and may encounter difficulties in understanding abstract concepts. The book will be of interest not only to students of technical specialties, but also to practitioners working in the field of system analysis, software development and process automation. It can also attract the attention of researchers seeking to expand their knowledge of fuzzy logic and its application in various disciplines. The topics raised in the book concern not only mathematical aspects, but also philosophical issues related to the understanding of uncertainty and subjectivity in decision-making. Rybin emphasizes that fuzzy logic is not just a mathematical tool, but a whole paradigm that allows a more flexible approach to the analysis of complex systems and phenomena. The author's style is clear and accessible. Rybin is able to explain complex things in simple language, which makes his manual a valuable resource for a wide audience. His previous work has also earned recognition, and this new edition continues the tradition of high-quality and in-depth presentation of the material. If you are interested in topics such as fuzzy logic, set theory or mathematical logic, this guide will be a real find for you. Thus, “Fundamentals of Fuzzy Set Theory and Fuzzy Logic: A Tutorial” is not just a book, but a whole world of possibilities for those who want to understand and master fuzzy logic. It opens new horizons in understanding complex systems and helps develop the critical thinking needed in our rapidly changing world. Do not miss the chance to immerse yourself in this fascinating topic and expand your knowledge with the help of the work of Vladimir Vasilyevich Rybin .