The book "Calculation of heat and mass exchange in contact devices" by Evgeny Ivanovich Andreev is an important and relevant work , which will be of interest not only to specialists in the field of chemical technology , And to all of them........................................ who seek to deepen their knowledge in the field of heat exchange and mass exchange. This publication will become an indispensable assistant for students, graduate students and practicing engineers working in the field of design and operation of various industrial installations. In his book, Andreev examines in detail the processes occurring in contact devices, such as columns, reactors and other devices used in the chemical and petrochemical industries. The author focuses on mathematical models and calculation methods that allow to accurately determine the efficiency of heat and mass exchange in these systems. Readers will be able to learn about the principles of operation of various devices, as well as about the factors affecting their performance. The book is written in accessible language, which makes it understandable even for those who are just starting their way in this area. Andreev uses many examples and practical problems, which helps the reader not only to assimilate theoretical aspects, but also to apply them in practice. This makes the book particularly valuable for students and young professionals who want to learn how to apply their knowledge in real-world settings. The topics raised in the book cover a wide range of issues related to heat transfer and mass exchange. The author discusses the importance of these processes to improve production efficiency, as well as their impact on environmental safety. In today's world, where sustainable development and rational use of resources become priorities, understanding these processes becomes especially relevant. The book will be an excellent source of information for those who are interested in modern methods of optimizing production processes and reducing the negative impact on the environment. Andreev’s writing style is clear and logical. He skillfully combines theory with practice, which makes the material not only informative, but also fascinating. Evgeny Ivanovich is the author of several other works on chemical technology and engineering, and his experience in this field allows him to deeply analyze and explain complex processes. Readers familiar with its previous editions will appreciate the consistency and depth of the presentation of the material in this book. “Calculation of heat and mass transfer in contact devices” will be an excellent addition to the library of any engineer or student seeking professional growth. This book will not only expand your knowledge, but also help you develop the analytical thinking you need to solve complex engineering problems. If you are looking for a high-quality source of information on heat exchange and mass exchange, which will be both accessible and deep, then this publication is exactly what you need. The book will also be of interest to those engaged in scientific research in the field of chemical technology, as it contains current data and research results that can be useful for further study and development of new technologies. Do not miss the opportunity to plunge into the world of heat and mass exchange with the help of the work of Evgeny Ivanovich Andreev - this is not just a book, but a whole world of knowledge that awaits you!