The book "Elements of the theory of Markov processes and mass service systems" by A. D. Korznikova is a fascinating and deep dive into the world of probability theory and statistics, which will become an indispensable tool for students, graduate students and specialists in mathematics, computer science and engineering. In this work, the author offers readers a unique look at Markov processes and their application in mass service systems, which makes the book relevant for a wide range of readers interested in both theoretical aspects and practical applications. The book begins with the basics, introducing the reader to the concept of Markov processes, which are mathematical models describing systems where the future state depends only on the current, and not on previous states. This principle of simplicity and clarity makes Markov processes particularly attractive for analyzing complex systems such as queues, networks, and other dynamical systems. Korznikov masterfully explains complex concepts, making them accessible to understanding, which allows readers without deep mathematical knowledge to immerse themselves in the topic. One of the key topics of the book is the mass service system, where the author considers various models, such as M/M/1, M/M/c and others. These models help understand how to manage customer flows, optimize resources, and minimize latency. Readers will be able to learn how to apply these theoretical models in practice, which is especially important for specialists in the field of logistics, telecommunications and business process management. The book will be of interest not only to students and graduate students, but also to practitioners working in the field of quality management, operational management and information technology .. If you are looking for a way to improve your skills in data analysis or want to understand how mathematical models can help in real business situations, this work will be a real find for you. The topics covered in the book cover a wide range of issues, including process optimization, performance analysis, and risk management. Korznikov not only explains the theoretical foundations, but also gives examples from real life, which makes the material more visual and applicable. This allows readers to see how the theory can be used to solve practical problems, which certainly adds value to the material being studied. The author's style is distinguished by clarity and logical presentation, which makes reading easy and exciting. Korznikov actively uses graphic illustrations and examples, which helps to better assimilate the material. His approach to learning is based on the principle of gradual complication, which allows the reader to confidently move from simple concepts to more complex ones. In addition to "Elements of the theory of Markov processes and mass service systems", A. D. Korznikov is the author of other works on probability theory and mathematical modeling, which testifies to his deep understanding of the subject and experience in this field. If you are interested in books such as “Probability Theory and Mathematical Statistics” or “Mathematical Modeling in Economics”, then this work will be an excellent addition to your library. In conclusion, “Elements of the theory of Markov processes and mass service systems” is not just a textbook, but a real find for everyone who wants to deepen their knowledge in the field of mathematical modeling and system analysis. This book will help you not only to master the theoretical foundations, but also to learn how to apply them in real situations, which makes it an indispensable tool in your educational and professional path.