The book “Definition and analysis of electricity losses in power grids” by Mikhail Fursanov is a deep and comprehensive study. dedicated to one of the most pressing problems of the modern energy sector - electricity losses in electric grids This edition will be useful to both energy professionals and students of technical universities, as well as to anyone interested in the issues of efficient use of resources and sustainable development of energy infrastructure. In his book Fursanov not only analyzes the causes of electricity losses, but also suggests methods for determining and minimizing them. It considers various aspects affecting the efficiency of electrical networks, including technical and economic factors. The reader will be able to learn about modern approaches to the analysis of losses, which can be used to optimize the operation of power systems. The author focuses on the importance of monitoring and analyzing data, which allows not only to identify problems, but also to find ways to solve them. The book will be of interest to a wide range of readers: from undergraduate and graduate students studying electrical engineering and energy, to practicing engineers and managers working in the field of energy management. It can also attract the attention of researchers involved in sustainable development and energy conservation. Fursanov uses accessible language and clear examples, which makes the material understandable even for those who are just beginning to get acquainted with the topic. The topics raised in the book cover a wide range of issues related to electricity losses. The author discusses not only the technical aspects, but also the economic consequences associated with inefficient use of electricity. With rising energy prices and the need to switch to more sustainable sources of energy, this book is becoming especially relevant. Readers will be able to see how electricity losses affect the overall efficiency of the power system, as well as the environmental situation in the world. Fursanov's style is distinguished by clarity and logical presentation, which makes his work easily perceived. He has already established himself as an author capable of conveying complex technical concepts to a wide audience. In his portfolio you can find many publications devoted to energy and electrical engineering, which confirms his deep knowledge and experience in this field. The book “Definition and analysis of electricity losses in power grids” is not just a textbook, but a real find for everyone who seeks to understand how power grids function and how their efficiency can be improved. It offers the reader not only theoretical knowledge, but also practical recommendations that can be applied in real life. This publication will be a valuable source of information for all who want to contribute to the development of the energy industry and make it more sustainable and efficient. If you are looking for literature on energy conservation, power grid optimization or just want to expand your knowledge in the field of energy, Fursanov’s book will be an excellent choice. Do not miss the opportunity to get acquainted with the work of the author, who, with the help of his experience and knowledge, helps us to better understand the complex world of the electric power industry.