The book “Air Conditioning and Refrigeration” by Bogoslovsky is an indispensable source of knowledge for all who are interested in modern climate control systems and refrigeration equipment. In this work, the author, with deep knowledge and practical experience, shares with readers the basics and intricacies of designing, installing and operating air conditioning and cooling systems. On the pages of the book, the reader will find detailed explanations of the principles of operation of various systems, ranging from the simplest window air conditioners to complex central systems used in large commercial and industrial facilities. Theologian not only describes the technical aspects, but also draws attention to the economic and environmental factors that are becoming increasingly relevant in the modern world. This book will be of interest to both students of technical universities and professionals working in the field of HVAC (heating, ventilation and air conditioning) . Engineers, designers, installers and even business owners seeking to optimize their climate control systems will find it a lot of useful information. Thanks to the available language and clear structure, the book is suitable for those who are just beginning to get acquainted with this topic, and those who want to deepen their knowledge. The topics raised in the book cover a wide range of issues: from the fundamentals of thermodynamics and physics of cooling processes to modern technologies and innovative solutions in the field of air conditioning. The author focuses on the importance of the correct choice of equipment, its installation and maintenance, which avoids many common errors and significantly increases the efficiency of systems. Theologian, known for his deep and practical research in the field of engineering, more than once became the author of textbooks and manuals, which became the reference books for many specialists. His writing style is clear and logical, which makes complex technical concepts easy to understand. Readers familiar with his previous work will appreciate the consistency and depth of analysis that the author retains in this book. “Air conditioning and cooling” is not just a tutorial, it is a real find for those who want to be aware of the latest trends in climate technology. The book also addresses issues of sustainable development and energy efficiency, making it particularly relevant in light of global climate change and the need to transition to greener technologies. If you are looking for information on how to choose the right air conditioner, which systems are best for your home or business, or want to learn about the latest innovations in the field of refrigeration, this book will become your reliable assistant. It will help you not only to understand the theory, but also to apply the knowledge gained in practice, which will certainly increase your qualifications and competitiveness in the market. Thus, “Air conditioning and cooling” is a must-read for anyone who wants to be one step ahead in their professional activities. Do not miss the opportunity to expand your knowledge and skills in this important and sought-after area!