The book "Mathematical methods of mass service theory" by Alexander Yakovlevich Hinchin is an outstanding work that has become a classic in the field of mass service theory and mathematical statistics. Published in the middle of the 20th century, Hinchin’s work remains relevant and in demand among students, graduate students and specialists in the field of system analysis, management and information technology. In his book, the author immerses the reader in the world of mathematical models that help to understand how service systems function, be it telephone networks, queues in banks or even production process control systems. Hinchin not only expounds the theory, but also offers the reader practical examples, which makes the material accessible and understandable. It addresses various aspects of mass service, including customer flows, latency, and system efficiency, allowing a deeper understanding of how processes can be optimized and service quality improved. This book will be of interest not only to students and teachers of mathematical and economic specialties, but also to practitioners seeking to improve their skills in managing customer flows. If you are interested in topics such as optimization of business processes, queue management or data analysis, then “Mathematical methods of mass service theory” will become an indispensable source of knowledge for you. One of the key topics raised in the book is the analysis of systems with different types of queues and their impact on performance. Hinchin explains in detail how mathematical methods can be applied to solve real problems, which makes the book not only a theoretical work, but also a practical guide. The reader will be able to see how theoretical concepts find their application in life, which adds depth and significance to the material. Hinchin's style is clear and logical, which allows even complex mathematical ideas to be perceived easily and at ease. His approach to teaching and explaining complex concepts makes this book a valuable resource for both beginners and experienced professionals. In addition, Hinchin is known for his other work in the field of probabilistic theory and mathematical statistics, which confirms his status as one of the leading scientists of his time. The book “Mathematical methods of mass service theory” also raises important questions about how modern technologies and algorithms can change the approach to customer service. With the rapid development of information technology and automation, knowledge of the mathematical foundations becomes especially relevant. Readers interested in areas such as artificial intelligence, machine learning and data analytics will find in this book many useful ideas and concepts that can be applied in their work. Thus, “Mathematical methods of mass service theory” is not just a textbook, but a real find for everyone who seeks to understand and improve service systems. This book will be your reliable companion in the world of mathematical analysis and will help you open new horizons in the study of mass service theory. Do not miss the opportunity to immerse yourself in the fascinating world of mathematics and its practical application, which Hinchin offers in his work.