The book "The method of associated waves of calculation of diffraction thin-film optical structures", written by the author's team headed by Yegorov A. A. and Lovett K. P. , with scientific editor Shiryaev V. Yu. It is a unique study that finds its place at the junction of optics, physics and engineering. This publication will become an indispensable assistant for students, graduate students and specialists in the field of optics, as well as for anyone interested in modern methods of calculating and analyzing optical structures. The book discusses in detail the method of associated waves, which allows you to effectively solve problems associated with the diffraction of light on thin-film structures. The authors offer the reader not only theoretical foundations, but also practical examples, which makes the material accessible and understandable. In the process of reading, you will plunge into the world of optical phenomena, where each element matters, and the accuracy of calculations plays a key role. Who can like this edition? First of all, it will be interesting for students and graduate students studying physics, optics and related disciplines . The book will also attract the attention of researchers working in the field of photonics and optical technologies, as well as engineers involved in the development and optimization of optical devices. Thanks to an accessible language and a clear structure, even those who are just beginning their journey in this area will be able to find useful information in the book. The topics raised in the book cover a wide range of issues related to the diffraction and interaction of light with materials. The authors emphasize the importance of thin-film structures in modern optical systems, such as lasers, optical filters and sensors. They also discuss the influence of various factors on diffraction characteristics, which allows the reader to understand more deeply how optical devices work in real-world conditions. The style of the authors is characterized by scientific rigor and clarity of presentation, which makes the material accessible to perception. Yegorov A. A. and Lovetsky K. P. are known for their work in theoretical and applied optics, and in this book they demonstrate their in-depth knowledge and experience. Their previous publications also address issues of optical technology and analysis methods, which adds value to this publication. The method of calculation of diffraction thin-film optical structures is not just a textbook, but a real find for everyone who seeks to understand the complex processes taking place in the world of light. It opens up new horizons for the reader in understanding optical phenomena and provides tools for their analysis. If you are looking for a high-quality and informative publication that will help you master modern methods of calculation in optics, this book will become your reliable companion. Do not miss the opportunity to immerse yourself in the fascinating world of optics and discover new horizons of knowledge with the help of the Connected Waves Method. This edition will guide you into the complex but exciting world of diffraction thin-film structures, and perhaps it will inspire you to new research and discoveries in this fascinating field of science.