The book “Group Theory and Its Applications in Quantum Mechanics of Molecules” is a unique publication that opens up to readers the world of mathematical structures and their significance in the field of quantum mechanics. The team of authors, who have gathered their knowledge and experience, offers a deep dive into group theory, showing how these abstract mathematical concepts can be applied to understand molecular systems and their behavior at the quantum level. At first glance, it may seem that group theory is an exclusively mathematical discipline, but the authors masterfully demonstrate how it penetrates physics, in particular, quantum mechanics. The book begins with the basics of group theory, explaining key concepts and principles such as symmetry, transformation groups, and their representations. These ideas serve as a basis for further analysis, where readers can see how molecular symmetries affect their energy levels and spectra. Who can be interested in this book? First of all, it is intended for students and postgraduates of physics, chemistry and mathematics, as well as for researchers working in the field of molecular physics and theoretical chemistry . However, interest in this topic can be shown by a wider range of readers, including teachers and practicing scientists who seek to deepen their knowledge in the field of quantum mechanics and mathematical physics. If you are passionate about topics such as symmetry, molecular structures and their interactions, then this book will be a real discovery for you. One of the key topics raised in the book is the relationship between symmetry and the physical properties of molecules. The authors examine in detail how symmetries determine not only the structure of molecules, but also their reactivity, spectroscopic characteristics, and even dynamics. This connection allows not only to better understand the nature of molecules, but also to predict their behavior in different conditions, which is of great importance in chemistry and materials science. The style of the authors is distinguished by clarity and accessibility, which makes complex mathematical concepts more understandable to the reader. They use many examples and illustrations to demonstrate how group theory can be applied in practice. This not only helps to learn the material better, but also makes reading fascinating and informative. The book is replete with examples from real practice, allowing the reader to see how abstract ideas can be used to solve specific problems. If you are familiar with other works in the field of mathematical physics, such as "Quantum mechanics" D. Griffiths or "