The book "Informal Youth Communities of St. Petersburg: Theory, Practice, Methods of Prevention of Extremism" is a unique and deep analysis of the modern youth movement in one of the most vibrant cultural centers of Russia. The author, whose name remains unknown, has created a work that will become an indispensable guide for specialists, researchers, teachers and anyone interested in the problems of youth subculture, social dynamics and the prevention of extremism. This book reveals to the reader a complex and multifaceted picture of the informal youth associations of St. Petersburg, their internal structure, values and ways of interaction. The author masterfully immerses in the atmosphere of youth communities, showing how they are formed, develop and affect the surrounding social environment. The focus is not only on the description of various groups, but also on the analysis of their role in modern society, as well as the challenges associated with the possible transformation of some of them into hotbeds of extremist activity. The book "Informal youth communities of St. Petersburg" is not limited to theoretical calculations It details practical aspects of working with young people, methods of preventing extremism, as well as strategies for interacting with youth leaders and activists. The author shares unique case studies, practical recommendations and innovative approaches, which makes the book a valuable tool for those who are engaged in preventive work, social adaptation and development of youth initiatives. Particular attention is paid to the themes of identity, finding their place in society, as well as the influence of modern technologies and social networks on the formation of youth communities. The book raises important questions about the boundaries of freedom and responsibility, about the need for dialogue and constructive interaction between the authorities, teachers and youth. The author shows how important it is to understand the internal motives of young people in order to effectively prevent extremism and radicalization. The book "Informal Youth Communities of St. Petersburg" is intended for a wide audience - from students and teachers to social work specialists, law enforcement agencies and heads of youth organizations . It will be interesting for those who want to better understand the processes taking place in the youth environment and find new approaches to their support and development. This work is especially valuable for those who are looking for modern methods of preventing extremist sentiment and want to contribute to the creation of a safe and open society. The style of the author is distinguished by analytical accuracy, is saturated with practical examples and a living description of real situations, which makes reading not only informative, but also fascinating. The book shows a deep understanding of the characteristics of youth culture, as well as the desire to find a balance between freedom and responsibility, which makes it relevant and important in the context of modern challenges. If you are interested in youth subculture, social policy, prevention of extremism or just want to understand how youth communities are formed and developed in St. Petersburg, this book will become a valuable source of information for you. It will help not only to expand the horizons, but also to equip with the practical knowledge necessary to work with young people in the conditions of modern Russia. Inspiring, informative and relevant - "Informal youth communities of St. Petersburg" from the author, whose name remains unknown, will certainly find a response in the hearts of those who seek to understand and develop the youth environment