The book "Quantum-Chemical Methods of Calculation of Molecules" under the authorship of Y. A. Ustynyuk and his colleagues are an exciting and deep dive into the world of quantum chemistry, which will become an indispensable tool for students, graduate students and specialists in the field of chemistry, physics and materials science. This work offers the reader not only theoretical foundations, but also practical aspects of the application of quantum chemical methods, which makes it relevant for both beginners and experienced researchers. From the first pages, the book captures attention thanks to a clear and accessible presentation of complex concepts. The authors aim to make quantum chemistry understandable and applicable, which is especially important for those who are just beginning their journey in this area. They explain how quantum chemical methods allow us to study molecules at the level of their atomic structure, to predict their properties and interactions, which opens up new horizons in chemical research and development. The book will be of interest to a wide range of readers: from senior students to professionals working in scientific laboratories and research centers. If you are passionate about chemistry, physics, biochemistry or materials science, then this publication will become a real storehouse of knowledge for you. It will also be useful for those interested in modern methods of computer modeling and simulation of molecules, as the authors consider in detail the various approaches and algorithms used in quantum chemistry. The topics raised in the book cover a wide range of issues, ranging from the basics of quantum mechanics to modern methods of calculation. The authors emphasize the importance of the theoretical foundation, which allows not only to understand, but also to apply quantum chemical methods in real-world problems. They discuss various software packages and tools that can be used for calculations, making the book a practical guide for researchers. Style of presentation Y. A. Ustynyuk and his team are distinguished by clarity and logic. They use a lot of examples and illustrations, which helps the reader to better absorb the material .. In addition, the book contains tasks and exercises that allow you to consolidate the acquired knowledge and develop skills in the practical application of quantum chemical methods. This makes the book not only a theoretical, but also a practical manual. It is worth noting that Y. A. Ustynyuk is the author and co-author of many scientific publications in the field of quantum chemistry and molecular modeling .. His experience and in-depth knowledge in this area give the book added value. Readers familiar with the author's other works will be able to appreciate the consistency and depth of analysis he offers in this edition. If you are looking for literature that will help you understand the complex aspects of quantum chemistry and teach you how to apply this knowledge in practice, then Quantum Chemical Methods for Calculating Molecules will become your reliable companion. This book will not only expand your horizons in understanding molecular interactions, but will also inspire new research and discoveries in the exciting world of science. Do not miss the opportunity to immerse yourself in this fascinating topic and discover new approaches to the study of molecules and their properties!