The book "Relay protection of power supply systems in examples and tasks: a textbook for students in the direction of engineering" edited by B. A. Andreeva is a unique work that will become an indispensable assistant for students and specialists in the field of electrical engineering and energy. This educational resource, created by a team of authors, offers a deep immersion in the world of relay protection, highlighting both theoretical aspects and practical tasks, making it ideal for those who seek not only to study the theory, but also to apply the knowledge gained in practice. The book covers a wide range of topics related to relay protection, including the principles of relay operation, protection schemes, as well as methods for diagnosing and troubleshooting in power supply systems. Each chapter contains examples and tasks that will help readers consolidate their knowledge and develop skills in solving practical problems. This makes the manual especially valuable for students preparing for exams or practical classes, as well as for engineers who want to update their knowledge in this important area. “Relay protection of power supply systems in examples and tasks” will be of interest not only to students of technical universities, but also to professionals working in the field of energy, as well as to everyone who is interested in modern technologies and methods of ensuring the reliability of power supply . The book is suitable for both beginners and experienced engineers who want to deepen their knowledge and skills in the field of relay protection. The topics raised in the book include not only technical aspects, but also issues of safety, reliability and efficiency of power supply systems. With the constant growth of electricity consumption and increasing load on the power grids, understanding the principles of relay protection becomes especially relevant. The book focuses on the importance of choosing and adjusting relay protection to prevent accidents and minimize the consequences of possible malfunctions. The style of the authors is characterized by accessibility and clarity of presentation, which allows even complex technical concepts to be presented in an understandable and visual form. They use many illustrations, diagrams and tables, which makes the material more visual and easy to perceive. This approach is especially valuable for students who may encounter difficulties in understanding the theory without practical examples. In addition, work B. A. Andreeva and his colleagues may be of interest to those who are already familiar with other works in the field of electrical engineering. For example, books on the basics of electrical circuits or on the automation of electrical systems can serve as an excellent addition to this tutorial. Readers interested in topics related to the sustainability and efficiency of energy systems will also find much useful information in this manual. In conclusion, “Relay protection of power systems in examples and tasks” is not just a textbook, but a whole practical guide to relay protection that will help readers confidently navigate in the complex and dynamic field of energy. This manual will be a reliable companion on the way to professional growth and an in-depth understanding of the basics of relay protection, which makes it mandatory for everyone who seeks success in this field.