The book "Indications for the calculation of cyclones" by Kouzova P. A. and other authors represents a unique and valuable resource for anyone interested in the design and analysis of cyclones devices used to separate particles in gas and liquid streams. This work will become an indispensable assistant for students, graduate students, engineers and researchers involved in chemical technology, mechanics and ecology. The book discusses in detail the basic principles of cyclones, their design and various methods of calculation. The authors offer readers an in-depth analysis of the theoretical foundations, as well as practical recommendations that will help in the design of effective systems for cleaning gases and liquids. The book includes many examples and tasks, which makes it especially useful for practitioners seeking to improve their skills and knowledge. The topics raised in the book cover a wide range of issues related to hydrodynamics, aerodynamics, and mechanics. The authors emphasize the importance of the correct choice of cyclone parameters to achieve maximum efficiency of their work. Readers will be able to learn about the different types of cyclones, their advantages and disadvantages, as well as about current trends in their development and application. This makes the book relevant for both students and experienced professionals who want to be aware of the latest developments in their field. The writing style of Kouzov and his colleagues is clear and accessible, which allows even beginners in this area to easily assimilate complex concepts. The authors use many illustrations and diagrams that help to visualize the processes and constructions described. This makes the book not only informative, but also fascinating to read. The book “Indications for the calculation of cyclones” will be of interest not only to engineers and scientists, but also to anyone who wants to understand more deeply how particle cleaning and separation technologies work. It will become a useful tool for students of technical universities, researchers in the field of ecology and environmental protection, as well as for specialists working in the field of design and operation of production processes. If you are looking for literature that will help you understand the intricacies of cyclone design and their application in various industries, then this book is exactly what you need. It will not only expand your knowledge, but also inspire new ideas and projects. It is important to note that the work of Kouzov P. A. and his colleagues are the result of years of research and practical experience, which gives the book added value. Thus, the Guidelines for the Calculation of Cyclones is not just a training manual, but a real find for everyone who aspires to professional growth and wants to be one step ahead in their field. Do not miss the opportunity to immerse yourself in the world of cyclones and discover new horizons in the field of engineering and technology.