The book “Contact fatigue of gears of transmissions of energy-saturated machines”, written by a team of authors led by Rudenko C . P. and Valco A. L. is an in-depth and comprehensive study of one of the key problems in the field of mechanics and mechanical engineering. This publication will become an indispensable source of knowledge for engineers, students of technical universities and everyone who is interested in modern technologies and their application in various industries. The book discusses in detail the aspects of contact fatigue of gears, which play a critical role in the transmissions of energy-saturated machines. The authors offer readers not only theoretical foundations, but also practical recommendations, which makes the material accessible and understandable. They analyze the mechanisms of fatigue, give examples from practice and offer methods for diagnosing and preventing this problem. The reader will be able to learn about modern approaches to calculating the strength of gears, as well as about the latest materials and technologies that can significantly increase their durability and reliability. The book will be of interest not only to specialists in the field of mechanical engineering, but also to students studying in areas related to mechanics, materials science and engineering .. It can become a basic training manual for future engineers, as well as a useful guide for practitioners working in the development and operation of energy-saturated machines. It raises important topics such as the impact of load on the life of gears, methods to increase their wear resistance and the impact of various factors on contact fatigue. The style of the authors is distinguished by clarity and logical presentation, which makes it easy to perceive even the most complex concepts. Rudenko S . P. and Valco A. L. are known for their scientific works and research in the field of mechanics, and their experience and knowledge make this publication especially valuable The book includes many illustrations, graphs and tables that help to better understand the material presented and visualize complex processes. The topics covered in the book are relevant not only for theorists, but also for practitioners. With the constant growth of requirements for reliability and efficiency of machines, issues related to contact fatigue are becoming more important. The book “Contact fatigue of gears of transmissions of energy-saturated machines” will help readers to understand these issues, providing them with the necessary tools to analyze and solve emerging problems. If you are looking for literature that combines theory and practice, as well as current research in the field of mechanical engineering, this publication will be a real find for you. It will not only expand your knowledge, but also inspire new ideas and developments. Read, study and apply the knowledge gained in practice and your projects will definitely be successful!