“Functional Methods in Quantum Field Theory and Statistics” is a deep and fascinating work written by the outstanding Russian physicist and mathematician A.. N. Vasilyev . This book will be a real discovery for students, graduate students and professionals interested in quantum physics, field theory and statistical mechanics. It offers the reader a unique approach to understanding complex concepts, using functional methods that are important tools in these areas. Vasilyev takes the liberty of explaining complex ideas, making them available to a wide audience. From the first pages of the book, the reader is immersed in the world of quantum theory, where he will be able to see how functional methods help solve problems that at first glance seem unbearable. The author not only outlines the theoretical foundations, but also supports them with practical examples, which makes the material more understandable and illustrative. The book covers a wide range of topics, ranging from the basics of quantum mechanics to advanced concepts such as quantum fields and their interactions. Vasilyev masterfully combines theory and practice, which allows the reader not only to assimilate the material, but also to apply it in real scientific research. An important part of the book are the sections devoted to statistical methods, which also play a key role in physics and other sciences. This work will be especially interesting for those who already have basic knowledge in the field of physics and want to deepen their knowledge. Students and graduate students studying physics, mathematics or related disciplines will find in the book many useful ideas and methods that will help them in scientific activities. In addition, researchers and practitioners of physics will be able to use the approaches proposed in the book to solve their own problems. The topics raised in "Functional Methods in Quantum Field Theory and Statistics" cover not only scientific aspects, but also philosophical issues related to the nature of reality and the interaction of particles. Vasilyev raises important questions about how we can describe the world around us using mathematical models and what limitations exist in these models. This makes the book not only a textbook, but also a philosophical reflection on the role of science in our understanding of the universe. The author's style is distinguished by clarity and logical presentation, which makes even the most complex concepts more accessible. Vasiliev is known for his work in theoretical physics and mathematical physics, and his previous books, such as Quantum Mechanics and Statistical Physics, have also been recognized for their depth and accessibility. In "Functional Methods" he continues this tradition by offering readers not only theoretical knowledge but also practical skills that can be applied in scientific work. If you are looking for a book that will expand your horizons in quantum theory and statistics, Functional Methods in Quantum Field Theory and Statistics A. N. Will be a great choice. This work will not only enrich your knowledge, but also inspire further research and discovery in the exciting world of physics. Do not miss the opportunity to immerse yourself in this fascinating and informative book, which will become an indispensable assistant on your scientific path.