The book "Mathematical Foundations of Information Theory" by Fedorov S. In. is a fascinating and in-depth study in the field of information theory that will be of interest to both students and professionals working in related fields. This tutorial not only immerses the reader in the world of mathematical concepts, but also opens the door to an understanding of modern information technologies. From the first pages, the author sets a tone that combines the rigor of the scientific approach and the accessibility of the presentation. Fedorov masterfully explains complex mathematical ideas, making them understandable even to those who do not have deep knowledge in this field. The book covers a wide range of topics, including entropy, coding, Shannon's theorem, and many other key aspects that are fundamental to understanding information as such. The reader will be able not only to master the theoretical foundations, but also to see their practical application in the real world. Who can like this manual? First of all, students studying mathematics, computer science or related disciplines . The book will also be useful to graduate students and young scientists who want to deepen their knowledge in information theory. Professionals working in the field of data processing, telecommunications or computer science will find in it valuable ideas and methods that will help them in their work. The age category of readers varies from high school students to people who already have experience in scientific or practical activities. The topics raised in the book cover not only mathematical aspects, but also philosophical questions concerning the nature of information. Fedorov raises important questions about how information shapes our perception of the world and how it can be used to solve various problems. This makes the book not only a textbook, but also a source of inspiration for reflection on the deeper aspects of our existence. Fedorov's style is clear and logical . Its ability to explain complex concepts in simple language makes reading easy and fun. This quality is especially valuable in educational literature, where it is important not only to convey information, but also to interest the reader. In addition to the Mathematical Foundations of Information Theory, Fedorov is also known for other works that address various aspects of mathematics and its application in modern technology. If you are looking for a book that will help you understand the basics of information theory, as well as expand your horizons in mathematics and computer science, this guide will be an excellent choice. It will not only enrich your knowledge, but also inspire further research and practical application of the knowledge gained. Do not miss the opportunity to get acquainted with the work of Fedorov - this can be the first step to new discoveries in the fascinating world of information