The book “Safety of Information Systems” edited by Elena Semina is an important and relevant work that immerses the reader in the world of information security, covering a wide range of topics and issues related to data protection and systems. This collective work, created by a group of experts in the field of information technology, is intended for professionals, students and anyone interested in modern challenges in the field of cybersecurity. With the rapid development of technology and an increase in the number of cyber attacks, the security of information systems is becoming not just an urgent topic, but a necessity. The book offers the reader an in-depth understanding of how information systems function, what threats they face, and how to effectively protect data from unauthorized access and leaks. It addresses both theoretical aspects and practical recommendations, making it useful for both beginners and experienced professionals. One of the key topics of the book is the analysis of modern threats in the field of information security .. The authors explore in detail various types of attacks, such as phishing, malware and DDoS attacks, as well as methods of preventing them. Readers will be able to learn about best security practices, such as data encryption, multi-factor authentication, and regular software updates. This makes the book a valuable resource for IT professionals, system administrators, and anyone responsible for the security of information systems in their organization. The book also draws attention to the importance of creating a corporate safety culture. The authors emphasize that the protection of information is not only the task of the IT department, but also the responsibility of each employee. In this context, training and awareness raising of workers about risks and protection methods are addressed, making work particularly useful for managers and managers. The style of Elena Viktorovna Semina and her colleagues is distinguished by the clarity and accessibility of the presentation. They skillfully combine theory with practical examples, which allows the reader to easily absorb material. The book is written taking into account the latest trends and technologies, which makes it relevant and useful in the rapidly changing world of information technology. This work will be of interest not only to information technology professionals, but also to students studying computer science, as well as to anyone who wants to better understand how to protect their data in the modern digital world. The book will be an excellent addition to the library for anyone interested in Internet security issues, as well as for those who are looking for practical tips on protecting information. If you’re looking for a literature on information system security that combines theory and practice, then “Information System Security” is exactly what you need. It will not only expand your knowledge, but also help you become more aware and prepared for the challenges that the digital era brings with it. Read, learn and protect your data wisely!