The book "Methods of research and determination of properties of steel steam boilers and other operating equipment" by K. Beljunas is a unique and in-depth study that will become an indispensable tool for specialists in the field of energy, mechanical engineering and materials science. In this paper, the author offers readers not only theoretical foundations, but also practical techniques that allow them to effectively investigate and evaluate the properties of steel used in steam boilers and other equipment operating under high pressure. K. Belyunas, known for his scientific works and research in the field of materials science, shares with readers his rich experience and knowledge. His writing style is clear and accessible, which makes complex technical aspects understandable even for those who are just beginning their journey in this area. The book will be of interest not only to professional engineers and researchers, but also to students of technical universities who want to deepen their knowledge about the properties of metals and their application in real conditions. One of the key topics addressed in the book is the importance of choosing the right materials to create reliable and safe equipment. Beljunas describes in detail the test methods that allow to determine the mechanical and physical properties of steel, as well as their behavior in operation. Readers will be able to learn about modern technologies used for analysis and testing, as well as how to correctly interpret the results of research. The book also raises questions regarding the safety and reliability of steam boilers, which is especially relevant in light of modern requirements for energy efficiency and ecology. The author focuses on how the wrong choice of materials can lead to serious consequences, including accidents and environmental disasters. This makes labor not only scientific, but also socially significant, as it can contribute to improving the level of safety in industry. For those interested in related topics such as mechanics, thermodynamics and engineering, Beljunas’ book will be an excellent addition to the library. It can be useful for both professionals and students seeking to gain in-depth knowledge in materials science and engineering. Readers who are looking for information about new methods of research materials, as well as current trends in the design and operation of equipment, will find in this book a lot of valuable ideas and recommendations. K. Beljunas is also known for his other works on research in materials science and mechanics, which emphasizes his expertise and authority in this field. Reading his books, you can be sure of the quality and relevance of the information provided . Thus, the “Method of research and determination of properties of steel steam boilers and other operating equipment” is not just a textbook, but a real find for anyone who wants to deepen their knowledge and skills in engineering and materials science. This book will be a reliable companion in your professional development and will help you better understand the complex processes taking place in the world of technology. Do not miss the opportunity to expand your horizons and immerse yourself in the fascinating world of science with K. Beljunas!