Lectures on the Theory of Functions of Complex Variable by Sidorov Yu. In. , Fedoryuk M. In. and Shabunin M. and . It is a fascinating and deep dive into the world of complex analysis, which is one of the most exciting sections of mathematics. This work will be an indispensable tool both for students studying mathematics, physics and engineering sciences, and for teachers seeking to deepen their knowledge and skills in this area. The book discusses in detail the basic concepts and principles of the theory of functions of a complex variable. The authors, having rich experience in teaching and research, offer the reader not just a set of formulas and theorems, but also a holistic understanding of the subject. Each lecture is structured in such a way that the reader can gradually delve into the material, starting with basic concepts and ending with more complex topics such as analytical functions, Cauchy integrals and deduction theorems. One of the key features of this book is its accessible presentation style. The authors strive to make complex mathematical ideas understandable and interesting, using illustrative examples and graphic illustrations. This makes the book particularly attractive for students and self-taught students who may encounter difficulties in learning the theory of functions of complex variable. Readers interested in mathematics, physics, as well as related disciplines, will find in this book a lot of useful materials that will help them not only in their studies, but also in their practical activities. The topics raised in the book cover a wide range of issues, ranging from the basics of complex analysis to its applications in various fields of science and technology. The authors emphasize the importance of complex functions in solving real-world problems, which makes their work especially valuable for future engineers and scientists. The book also touches on aspects such as the relationship between complex analysis and other areas of mathematics, allowing the reader to see the holistic picture and understand how different areas of science are interconnected. The style of the authors is clear and logical, which makes the material available for perception. Sidorov Yu . In. , Fedoryuk M. In. and Shabunin M. and . experienced teachers and researchers who know how to interest the reader and keep his attention. Their previous work is also noteworthy: they have published many articles and tutorials that have already established themselves in the academic community. The book will be useful not only for students, but also for graduate students, researchers and anyone interested in mathematics at a deeper level. It will be a great addition to the library for anyone who wants to expand their knowledge of complex analysis and its applications. Readers who are looking for a high-quality and in-depth guide to the theory of functions of a complex variable will certainly find in this book what they were looking for. Thus, "Lectures on the theory of functions of a complex variable" is not just a textbook, but a real find for everyone who wants to understand and master one of the most interesting and complex sections of mathematics. Get acquainted with this book and you will discover new horizons in the world of complex analysis!