Book "Elements of the Theory of Fuzzy Sets" by E. In. Bakhusova is a fascinating and in-depth study that opens up to the reader a world of fuzzy logic and its application in a wide variety of fields of science and practice. Unlike traditional set theory, where elements either belong to a set or not, fuzzy set theory offers a more flexible approach, allowing elements to have a degree of belonging. This makes it especially relevant in the face of the uncertainty and incompleteness of information that we face in the modern world. The book will be of interest to both undergraduate and graduate students studying mathematics, computer science, economics and related disciplines, as well as practitioners working in the field of artificial intelligence, control systems, data analysis and other high technologies. If you are interested in mathematics, logic or want to understand how theoretical concepts can be applied to real problems, then this work will be a real find for you. In Elements of Fuzzy Set Theory, Bachusov not only explains basic principles and concepts, but also immerses the reader in practical examples, demonstrating how fuzzy sets can be used to solve complex problems. It examines various aspects of theory, such as fuzzy relationships, fuzzy rules and systems, and their application in various fields, including economics, psychology, and engineering. This makes the book not just a theoretical work, but a practical tool that can be used in real projects. The topics raised in the book cover a wide range of issues: from the philosophical foundations of fuzzy logic to its application in modern technologies. Bakhusov raises important questions about how we perceive information and make decisions under uncertainty. This is especially true in the era of big data, when it is necessary to process and analyze huge amounts of information, often containing conflicting or incomplete data. The author's style is clear and accessible. He skillfully combines theoretical aspects with practical examples, which makes the material understandable even for those who do not have deep knowledge in mathematics. Bakhusov is also known for his other work on control theory and artificial intelligence, and in this book he continues to develop his ideas, emphasizing the importance of fuzzy logic in the modern world. The book “Elements of the Theory of Fuzzy Sets” is not just a textbook, but a real find for anyone who wants to expand their horizons and deepen their understanding of complex concepts. It will become an indispensable resource for students, teachers and researchers, as well as for practitioners seeking to incorporate best practices into their work. If you are looking for literature that will help you understand the intricacies of fuzzy logic and its application, then this work should definitely take place on your shelf. Do not miss the opportunity to immerse yourself in the world of fuzzy set theory and discover new horizons of knowledge with the book E. In. Bakhusova . This work will not only enrich your intellectual baggage, but also inspire new ideas and projects in your professional activities.