The book “Information Security and Countering the Threats of Extremism and Terrorism” is an important and relevant publication created by a team of authors that immerses the reader in a complex and multifaceted world of modern security threats. In the context of globalization and the rapid development of technology, security issues are becoming especially relevant, and this book offers an in-depth analysis of issues related to information security and countering extremism and terrorism. The book discusses key aspects related to the threats that may arise from the use of information technology. The authors raise important questions about how extremist and terrorist groups use the Internet and modern communication tools to spread their ideology, recruit new members and organize attacks. This topic becomes especially important in light of recent events in the world, when cyber attacks and misinformation have become an integral part of global politics. The book is intended for a wide audience, including students, graduate students, security professionals, law enforcement agencies, as well as anyone interested in information security and counter-terrorism. It will be useful for those who want to better understand the mechanisms of extremist groups and the ways in which these threats can be effectively countered. Readers interested in the topics of cybersecurity, social psychology and political science will find in this book a lot of useful information and new ideas. One of the key topics raised in the book is the need to integrate different approaches to security. The authors emphasize that effectively countering threats requires not only technical equipment, but also an integrated approach that includes educational programs, social initiatives and international cooperation. This makes the book particularly relevant to security professionals who are committed to developing effective strategies and methods. The style of the authors is distinguished by clarity and logical presentation, which allows the reader to easily assimilate complex concepts and ideas. Each chapter contains not only theoretical calculations, but also practical examples, which makes the material more accessible and understandable. In addition, the book includes an analysis of successful practices from different countries, which allows the reader to see how different approaches can be adapted depending on specific conditions. The book “Information Security and Countering the Threats of Extremism and Terrorism” deserves attention not only due to its relevance, but also due to the fact that it opens new horizons for discussion and analysis. At a time when the world is facing growing threats, such publications are becoming an important tool for creating an informed approach to security. If you are looking for literature that will help you better understand modern security challenges, as well as offer practical solutions to overcome them, then this publication will be a real find for you. Read, analyze and apply the knowledge gained in practice - because information security and countering extremism is not only the task of specialists, but also the responsibility of each of us