Group Theory and Quantum Fields by Rumer Yu. B. and Feta A. and . It is a fascinating and deep dive into the world of theoretical physics, where complex mathematical concepts and physical phenomena intersect. This work will be a real find for students, graduate students and anyone interested in modern directions in physics, especially in the field of quantum field theory and group theory. The main idea of the book is to show how mathematical structures, such as symmetry groups, affect physical laws and phenomena. The authors, with rich experience in theoretical physics, offer the reader not just a set of formulas and theorems, but a holistic view of how these mathematical tools help explain physical reality. They consider quantized fields as a generalization of classical theory, which allows a deeper understanding of the interactions of elementary particles and their behavior under different conditions. The book will be especially interesting for those who already have basic knowledge in the field of physics and mathematics, and seeks to expand their horizons. Students of physics, graduate students and researchers working in the field of theoretical physics will find in it many useful ideas and approaches that will help in their scientific activities. It can also attract the attention of science lovers who want to understand complex issues related to the structure of matter and interactions at the quantum level. The topics raised in the book cover a wide range of issues, including symmetry, invariance, and their role in the construction of physical theories. The authors emphasize the importance of group theory in quantum mechanics and show how these concepts are applied to describe fundamental interactions in nature. The reader will be able to see how abstract mathematical ideas become the basis for understanding real physical processes, which makes the material not only theoretically significant, but also practically applicable. The style of Rumer and Fet is distinguished by clarity and accessibility of presentation, which allows even complex topics to be understandable to the reader. The authors use many examples and illustrations to make the material more clear and understandable. This makes the book not only a scientific work, but also a fascinating reading that may interest even those who are not professional physicists. “Group Theory and Quantum Fields” is not just a textbook, but a real encyclopedia of knowledge that opens doors to the world of high technology and modern scientific research. Readers interested in topics such as quantum mechanics, theoretical physics, mathematical physics, as well as in the broader context of the philosophy of science and the methodology of scientific knowledge, will find in this book many valuable ideas and inspirations. If you are looking for literature that will help you understand the complex aspects of physics and mathematics, and also give you the opportunity to look at these disciplines from a new perspective, then Group Theory and Quantum Fields will be an excellent choice for you. This book will not only expand your knowledge, but also inspire further research in theoretical physics.