The book "Supporting notes on electromagnetism" by Yu. In. Bobyleva is an indispensable assistant for students, graduate students and anyone interested in physics and engineering sciences. In this edition, the author seeks to convey to the reader the complex concepts of electromagnetism in an accessible and understandable form, which makes it an ideal choice for both beginners and more experienced researchers. Electromagnetism is one of the fundamental topics in physics, which covers a wide range of phenomena and laws, from the simplest electric charges to complex electromagnetic fields. Bobylev, possessing deep knowledge and experience in this field, offers readers not only a set of theoretical knowledge, but also practical examples that will help to better understand and master the material. The book includes key concepts such as Ohm's law, Maxwell's equations, magnetic fields and their interaction with electric currents, as well as a variety of tasks and exercises that will help consolidate what has been learned. This book will be especially interesting for students of technical specialties, as well as for those who are preparing for exams or Olympiads in physics. If you are studying at the Faculty of Physics, Engineering or even in the field of information technology, “Electromagnetic reference notes” will become a valuable resource for you. It will also be suitable for teachers who are looking for quality materials to prepare for classes or to create their own training courses. The topics raised in the book cover not only theoretical aspects, but also the practical application of electromagnetic phenomena in modern technologies. Bobylev focuses on how electromagnetism affects everyday life, from the operation of electrical appliances to the transmission of information through wireless networks. This makes the book relevant and useful to a wide audience, including those with an interest in science and technology but no in-depth knowledge of physics. The style of the author can be described as clear and logical, which allows the reader to easily follow the course of thought and assimilate even the most complex topics. Yu. In. Bobylev is known for his work in physics and education, and his approach to learning has always been characterized by attention to detail and a desire to make complex things simple. In his other works, similar approaches can also be found, which testifies to his ability to explain complex concepts in an accessible form. The book “Electromagnetism Reference Notes” is not just a textbook, but a real find for anyone who wants to deepen their knowledge in the field of physics. It will become your faithful companion in the study of electromagnetism, will help you prepare for exams and will give you the opportunity to confidently cope with practical tasks. If you are looking for high-quality materials on physics that will help you not only learn, but also develop in this fascinating area, then this publication is definitely worth your attention. Do not miss the opportunity to get acquainted with this book, which can become the basis of your understanding of electromagnetism and will open new horizons in the study of physics. Support your knowledge and skills with Yu.'s "Electromagnetism Reference Notes" In. Bobyleva - and you will not regret your choice!