The book "Aerodynamic calculation and optimal design of the flow part of turbomachines" edited by A. In. Boyko, with participation of Y. N. Govorushchenko and S. In. Ershova is a unique publication that will become an indispensable assistant for specialists in the field of aerodynamics, mechanical engineering and energy. This work, published by the Ministry of Education and Science of Ukraine and the National Academy of Sciences of Ukraine, immerses the reader in the fascinating world of aerodynamic calculations, revealing the subtleties of designing the flow part of turbomachines. The book covers a wide range of topics related to aerodynamic processes occurring in turbomachines. The authors pay special attention to the methods of calculation and optimization, which makes the publication relevant for both students and experienced engineers and researchers. The reader will be able to learn about modern approaches to design, including numerical methods and experimental studies, which allows a deeper understanding of the mechanisms that affect the efficiency of turbomachinery. This book will be of particular interest to those studying or working in aerodynamics, energy, and related disciplines such as fluid mechanics and thermodynamics. It is suitable for both students of technical universities, and for graduate students and young scientists seeking to expand their knowledge in this area. Engineers involved in the design and optimization of turbomachines will find in it practical recommendations and examples that will help them in their daily work. The topics raised in the book cover not only theoretical aspects, but also practical applications. The authors discuss the importance of optimizing aerodynamic characteristics to improve the efficiency of turbo cars, which is a key factor in modern conditions of increasing requirements for energy systems. They also consider the influence of various factors on aerodynamic processes, such as the shape of the blades and flow conditions, which allows the reader to better understand the interaction between the design and its performance. The style of the authors is distinguished by clarity and accessibility, which makes complex concepts understandable even for those who are just starting their way in the study of aerodynamics. A. In. Boyko, as editor-in-chief, brings his rich experience and knowledge to the book, which makes it especially valuable. He is known for his work in the field of aerodynamics and design, and his contribution to this publication emphasizes the high scientific value of the book. If you are looking for literature on aerodynamic calculations, design optimization or just want to deepen your knowledge in the field of turbomachines, this book will be a real find for you. It will not only enrich your knowledge, but also inspire new ideas and solutions in your professional activities. Readers interested in works such as Aerodynamics and Hydrodynamics or Turbomachines: Theory and Practice will also find much useful and interesting in this edition. In conclusion, “Aerodynamic calculation and optimal design of the flow part of turbomachines” is not just a textbook, but a whole world of knowledge that awaits its reader. Immerse yourself in an exciting journey of aerodynamic calculations and discover new horizons in the design of turbomachines!