The book "The Theory of Machines and Mechanisms", written by the author's team Frolov, Popov and Musatov, is a fundamental work in the field of mechanical engineering and mechanics. This publication will be useful to both students of technical universities and practicing engineers seeking to deepen their knowledge of mechanical systems and their functioning. The book focuses on the basic principles of machines and mechanisms, their design and analysis. The authors consider in detail the different types of mechanisms, their kinematics and dynamics, as well as methods of calculation and design. The reader will be able to get acquainted with basic concepts, such as the transmission of movement, forces and moments, as well as with modern approaches to the creation of efficient and reliable machines. The book is replete with examples and tasks, which makes the material more accessible for understanding and application in practice. Who can like this publication? First of all, it will be interesting for students and graduate students studying mechanical engineering, mechatronics and related disciplines . Engineers and designers working in the production sector will also find in the book many useful ideas and solutions for their projects. In addition, the Theory of Machines and Mechanisms will attract the attention of everyone who is interested in modern technologies and their application in various industries. The topics raised in the book cover a wide range of issues related to machine design and analysis. The authors emphasize the importance of theoretical foundations for practical application, which makes the book not only a textbook, but also a reference book for engineers. With the rapid development of technology and the need to improve the efficiency of production processes, the knowledge set out in this publication is becoming especially relevant. The style of the authors is distinguished by the clarity and accessibility of the presentation, which allows readers to easily assimilate complex concepts. Frolov, Popov and Musatov are well-known experts in their field, and their experience is reflected in each chapter of the book. They not only share theoretical knowledge, but also offer practical recommendations, which makes the material particularly valuable for future engineers. It is worth noting that the Theory of Machines and Mechanisms is part of a wider range of engineering literature. Readers interested in this field may also pay attention to other well-known works, such as L. D. Landau and E. M. Lifshitz or "Dynamics of Machines" A. A. Baranova . These books will help deepen the understanding of mechanical systems and broaden the horizons in the field of engineering sciences. In conclusion, the Theory of Machines and Mechanisms is not just a textbook, but a real find for everyone who wants to understand the complex but fascinating world of machines and mechanisms. Thanks to the available presentation and practical examples, the book will become a reliable assistant for both students and professionals. If you are aspiring to new knowledge and want to be one step ahead in your profession, this publication definitely deserves your attention.