The book "Lectures on Theoretical Physics", written by outstanding scientists and teachers - Belavin, Kulakov and Usmanov - is a unique work that will become a reference book for everyone who is interested in physics at a deep level. This work covers a wide range of topics, from the fundamentals of theoretical physics to more complex concepts, and does so with clarity and accessibility, making it suitable for both students and more experienced researchers. In "Lectures on Theoretical Physics" the authors seek not only to convey knowledge, but also to inspire the reader to further study this fascinating science. The book covers key aspects of theoretical physics, such as mechanics, thermodynamics, electromagnetism, and quantum mechanics, while focusing on their interrelation and application in various fields of science and technology. The reader will be able to see how theoretical concepts find their application in real life, which makes the material especially relevant and interesting. This book will be especially useful for students and graduate students studying physics, as well as teachers and researchers seeking to deepen their knowledge in this area. It is suitable for those who want not only to master the theory, but also to learn how to apply it in practice. If you are passionate about physics, mathematics or engineering, the "Lectures in theoretical physics" will be a real discovery for you. The topics raised in the book cover not only the basics of physics, but also modern advances in this field. The authors discuss such important issues as the nature of time and space, the interaction of matter and energy, and the role of the observer in the quantum world. These topics are not only relevant to the scientific community, but also cause interest among a wide audience, which makes the book especially valuable. The style of the authors is distinguished by clarity and logical presentation, which allows the reader to easily assimilate complex concepts. Belavin, Kulakov and Usmanov use many examples and illustrations, which makes the material more clear and understandable. Their approach to learning is based on the principle that knowledge should be accessible and interesting, which is certainly reflected in every chapter of the book. This work is not the only work of the authors. Each of them has a lot of publications and scientific research that are also worthy of attention. For example, Belavin is known for his work in theoretical physics and mathematical physics, Kulakov for his research in quantum mechanics, and Usmanov for his work in astrophysics. Their joint work in "Lectures on Theoretical Physics" demonstrates the synergy of their knowledge and experience, which makes the book especially valuable for readers. If you are looking for a high-quality and in-depth theoretical physics textbook that will not only teach, but also inspire, “Lectures in Theoretical Physics” is what you need. This book will be your reliable companion in the world of physics, opening the door to an exciting world of scientific discoveries and theoretical research. Do not miss the opportunity to immerse yourself in an exciting journey through the laws of nature and expand your horizons of knowledge!