Counterintelligence and Espionage: A Treatise . (Business Security: in 4 kn. kn. 2)" by Dmitry Vladimirovich Zerkalov is a unique publication that immerses the reader in the world of covert operations, defense strategies and complex intrigues related to counterintelligence and espionage. This is not just a tutorial, but a real encyclopedia of knowledge that will be of interest to both security professionals and those who just want to expand their horizons in understanding this complex and multifaceted topic. The book covers a wide range of issues related to business security, including methods for detecting and preventing espionage attacks, as well as ways to protect corporate information. With a wealth of experience and in-depth knowledge in this area, Zerkalov shares his observations and recommendations that can be useful for company executives, security professionals and anyone interested in protecting businesses from external threats. The topics raised in the book are more relevant than ever. In the context of globalization and the rapid development of technology, issues of counterintelligence and espionage are becoming increasingly important. Zerkalov draws attention to how modern companies can become targets for spies, and offers effective methods of protection. It also addresses the ethical aspects of espionage operations and counterintelligence, making the book particularly valuable to those seeking not only success but also to uphold the moral norms of business. This book will be of interest to a wide audience. It is suitable for both students and graduate students studying security and management, as well as practitioners working in the field of information security and corporate security .. The book can also attract the attention of entrepreneurs who want to protect their business ideas and developments from unfair competition. Dmitry Zerkalov’s style is distinguished by clarity and accessibility, which makes complex concepts understandable even for those who do not have a special education in the field of security. His ability to combine theory with practical examples allows readers not only to assimilate material, but also to apply it in real life. Zerkalov is also known for his other works on security issues, and his name has become synonymous with qualitative and in-depth analysis in this area. The book "Counterintelligence and espionage: textbook" is not only informative, but also fascinating. The reader will be able to plunge into the world of spy games, learn about real cases from practice and understand how to protect their interests in the face of fierce competition. This edition will be an indispensable assistant for all who strive for success in business and want to be one step ahead of their rivals. If you are looking for literature that will help you understand the intricacies of counterintelligence and espionage, this book will be an excellent choice. Not only will it expand your knowledge, but it will also provide practical tools to protect your business. Do not miss the opportunity to get acquainted with the work of one of the leading experts in the field of security and discover new horizons in the business world!