The book "Preliminary investigation in the OVD . Textbook. H. 1. Edited by . M. In. Meshkova” is an important and relevant work that will become an indispensable assistant for law students, practicing lawyers, investigators and anyone interested in issues of criminal procedure and law enforcement . This textbook is a deep dive into the specifics of the preliminary investigation in the internal affairs bodies, revealing its key aspects and methodological approaches. In the first part of the textbook, the authors gathered under the editorship of M. In. Meshkov systematizes knowledge about preliminary investigation, starting with its theoretical foundations and ending with practical recommendations. The book covers a wide range of topics, including the legal basis of investigative activities, the procedural actions of the investigator, as well as the peculiarities of interaction with other participants in the criminal process. The reader will be able to learn about the role of the investigator in solving crimes, how to properly collect and analyze evidence, and how to ensure the legality and validity of their actions. This book will be especially useful for law students who are preparing for future professional activity in law enforcement. However, it will also interest more experienced professionals seeking to update their knowledge and become familiar with modern approaches to investigative practice. Practitioners and investigators will find relevant recommendations and examples from real practice in it, which will help them in their daily work. The topics raised in the book cover not only the technical aspects of investigative activities, but also ethical issues related to the work of the investigator. The author’s team focuses on the importance of respect for human rights and the rule of law in the investigation process, which makes this textbook especially relevant in the light of the current challenges facing law enforcement agencies. The style of writing the book is clear and accessible, which makes complex legal concepts understandable even for those who are just starting their way in law. M. In. Mashkov, known for his work in the field of criminal procedure and investigative practice, brings his experience and professionalism to the text, which gives the book additional value. His other well-known works, such as Criminal Process: Theoretical and Practical Aspects and Investigative Practice: Problems and Solutions, also deserve attention and can serve as an excellent addition to the study of the issues raised in this textbook. «Preliminary investigation in OVD . Textbook. H. 1" is not just a training manual, but a real find for anyone who wants to understand the mechanisms of the investigative bodies and learn how to effectively apply the knowledge gained in practice. The book will become a reliable guide in the world of criminal law, opening the door for the reader to the complex but fascinating profession of an investigator. If you are looking for quality literature on the criminal process, are interested in the topics of investigation and law enforcement, or just want to expand your knowledge in the field of law, this textbook will be an excellent choice. Do not miss the opportunity to get acquainted with the work of the authors who lovingly and diligently approached the creation of this tutorial, and discover new horizons in the world of jurisprudence.