The book "Sources of modern private law" by D. In. Erofeeva is a deep and comprehensive study that immerses the reader in the complex world of private law, its sources and mechanisms of action. This work will become an indispensable tool for both law students and practicing lawyers who want to expand their knowledge and understanding of topical issues in the field of private law. In the book, Yerofeyev examines the main sources of modern private law, including laws, judicial precedents, doctrines and international agreements. The author not only lists these sources, but also analyzes their impact on law enforcement practice, which makes the text especially valuable for those who seek to understand how theoretical concepts are embodied in real life. The reader will be able to see how private law adapts to changes in society and the economy, and what challenges lawyers face in the context of globalization and digitalization. The book will be of interest to a wide range of readers: from undergraduate and graduate students studying law, to professionals working in the legal field. It is suitable for those who are interested in the legal aspects of business, contracts, consumer protection and other important topics. If you are looking for information about how current trends affect private law, or want to deepen your knowledge of its sources, this work will be a real find for you. The topics raised in the book cover both theoretical and practical aspects of private law. Yerofeev addresses the issues of the legal system, its evolution and adaptation to new realities, and also considers the role of courts and legal institutions in the formation of law enforcement practice. He emphasizes the importance of legal regulation in ensuring stability and predictability in private relations, which makes the book relevant for discussion in the context of modern economic and social changes. The author's style is distinguished by clarity and logical presentation, which allows the reader to easily perceive even the most complex concepts. D. In. Yerofeev is known for his work in the field of civil and commercial law, and his experience in practice enriches