The book "Methods of data compression" by Vatolin D. and its co-authors is an exciting and deep dive into the world of information processing, which will be an indispensable tool for both computer science students and computer science professionals. This work opens up to the reader many aspects of data compression that play a key role in today's digital world, where the amount of information is growing every day. Data compression is not just a technical process, it is an art that allows you to optimize the storage and transmission of information. The book discusses in detail the various algorithms and methods used to reduce the volume of data without losing their quality. The authors share their knowledge of approaches such as Huffman algorithms, LZW and many others. Each method is explained with examples, which makes the material understandable even to those who are just beginning to get acquainted with this topic. Who can like this book? First of all, it will be of interest to students and graduate students studying computer science, programming and related disciplines . It will also attract the attention of IT professionals, software developers and system administrators who want to deepen their knowledge of data optimization methods. Even technology enthusiasts who want to understand how modern information storage and transmission systems work will find this book a lot of useful. The topics raised in "Data Compression Methods" cover not only technical aspects, but also philosophical issues related to information processing. The authors discuss how data compression affects the quality of information, its availability and security. As data becomes an increasingly valuable resource, understanding compression and processing techniques becomes critical. The book makes you think about how technology is changing our perception of information and what consequences it can have for society as a whole. The style of the authors is clear and accessible, which makes reading a book not only informative, but also fascinating. Vatolin D. He is known for his scientific works and publications in the field of computer science and programming, and in this book he demonstrates his experience and deep knowledge. Readers familiar with his other works will appreciate the consistency and consistency of the presentation, as well as the wealth of examples and practical tasks that will help consolidate the material. If you are looking for books on topics related to data processing, algorithms or programming, then Data Compression Methods will be a great addition to your library. Not only will it expand your knowledge of data compression, but it will also help you better understand how these techniques are applied in real life. Readers interested in such works as "Algorithms: construction and analysis" Cormen or "