The book "Improvement of efficiency and reliability of equipment of electric power supply of urban electric transport" by Nikolai Zagaynov is an important work that immerses the reader in the world of modern technologies and engineering solutions used in the field of urban electric transport . This work will become an indispensable resource for specialists in the field of electrical engineering, students of specialized universities, as well as anyone interested in the development of urban infrastructure and sustainable transport systems. In the book, the author examines in detail the problems associated with the power supply of urban electric transport, including trams and trolleybuses. Zagainov focuses on how improving the efficiency and reliability of equipment can significantly improve the quality of transport services and reduce operating costs. He shares his observations and conclusions based on years of experience in the field, making his recommendations particularly valuable. One of the key themes of the book is the need to integrate new technologies into existing power supply systems. Zagainov discusses how modern solutions, such as the use of renewable energy sources and intelligent control systems, can improve the sustainability and efficiency of urban electric transport. Readers will be able to learn about various optimization methods that help not only to reduce costs, but also to minimize the negative impact on the environment. The book will be of interest not only to professional engineers and specialists in the field of electrical engineering, but also to students who seek to deepen their knowledge in this field. It can also attract the attention of urban planners and managers involved in sustainable development and modernization of transport infrastructure. In the context of global climate change and urban population growth, the issues raised in this work are becoming especially relevant. The style of Nikolai Zagaynov is distinguished by clarity and accessibility, which allows readers to easily assimilate complex technical concepts. He skillfully combines theoretical aspects with practical examples, which makes the material not only informative, but also fascinating. In his works there is always a desire for innovation and the search for non-standard solutions, which emphasizes his status as an expert in the field of electrical engineering. In addition to this book, Zagainov is the author of many articles and studies devoted to the issues of electricity supply and sustainable development of urban transport. His works are often cited in scientific circles and used in educational institutions, which confirms the high level of his expertise. In conclusion, "Improving the efficiency and reliability of urban electric transport equipment" is not just a book, but a whole platform for discussing topical issues related to the future of urban electric transport. It inspires new ideas and approaches that can change the face of cities and make them more comfortable and environmentally friendly to live in. If you are interested in the topics of sustainable development, electrical engineering or just want to understand how the urban electric transport system works, this book will be a real find for you.