Quantum Systems with Hidden Symmetry . Interbasic decompositions" by Mardoyan L. G. , Pogosyan G. C. and others is a fascinating and in-depth study that opens up new horizons in the field of quantum mechanics and theoretical physics. In this paper, the authors offer readers a unique perspective on the complex aspects of quantum systems, focusing on hidden symmetries and inter-base decompositions, which makes the book not only a scientific but also an intellectual challenge for anyone interested in modern physical theories. The book is intended for students, graduate students and researchers in the field of physics, as well as for anyone who seeks a deeper understanding of quantum systems and their behavior. If you are passionate about theoretical physics, mathematics or just want to expand your knowledge of quantum phenomena, this publication will be a real find for you. In it you will find not only theoretical foundations, but also practical examples that will help to better assimilate the material. One of the central themes of the book is the concept of hidden symmetry. The authors explain in detail how this symmetry affects the dynamics of quantum systems and how it can be used to simplify calculations and modeling. Unlike traditional approaches, which are often limited to explicit symmetries, more complex cases are considered here, which allows for a deeper understanding of quantum processes. The interbasic decompositions discussed in the book are a powerful tool for analyzing quantum systems. The authors demonstrate how solutions to various problems can be found with these decompositions, making the book useful for both theorists and practitioners. You will be able to see how these techniques are applied in real physical tasks, which will give your study practical value. The style of the authors is distinguished by clarity and accessibility, which makes complex concepts more understandable even for those who are not specialists in the field of physics. Mardoyan L. G. and Pogosyan G. C. are known for their work in quantum mechanics and theoretical physics, and their experience allows them to expound material with a high degree of professionalism Their previous publications also deal with topics related to symmetries and quantum systems, which creates a holistic picture of their scientific activity. This book not only expands the boundaries of knowledge about quantum systems, but also raises important philosophical questions about the nature of reality and our understanding of the world. Issues of symmetry and its role in physics have always been at the center of scientific discussions, and the authors offer a fresh look at these issues, which makes the book relevant and meaningful in the context of modern research. If you are looking for literature that combines in-depth analysis, theoretical research, and practical applications, "Quantum Systems with Hidden Symmetry. Interbasic decompositions” will become your faithful companion in the world of quantum physics This book will not only enrich your knowledge, but also inspire new research and discoveries in an area that continues to amaze and intrigue scientists around the world. Do not miss the opportunity to immerse yourself in the fascinating world of quantum mechanics with this outstanding work, which will certainly take a worthy place on the shelf of everyone who seeks to know the unexplored depths of science.