The book "Direct and Reverse Problems in Hydrooptics: Theoretical Aspects" by Viktor Alexandrovich Yakovlev is a fascinating and deep immersion in the world of hydrooptics, a science that studies the interaction of light with water environments. This work will become an indispensable tool for students, graduate students and researchers interested in optics and physics, as well as for professionals working in the field of optical technology and hydrology. In his book Yakovlev reveals complex concepts concerning direct and inverse problems in hydrooptics. Direct tasks involve determining the optical characteristics of the medium, while inverse tasks involve restoring the parameters of the medium based on the observed data. This interaction between theory and practice makes the book particularly valuable for those seeking to understand how light behaves in different water conditions and how this knowledge can be applied in real-life situations. The book will be of interest not only to specialists in the field of physics and optics, but also to those who are fond of ecology, meteorology and even artificial intelligence, since many image and data processing algorithms use the principles described in hydrooptics. Students studying physics or engineering will find useful materials for their coursework and thesis in it, and teachers will be able to use it as a teaching aid to explain complex topics. The topics raised in the book cover a wide range of issues, including the theoretical foundations of hydro-optics, methods for solving direct and inverse problems, as well as the practical applications of this knowledge in various fields of science and technology. Yakovlev not only expounds the theory, but also offers readers many examples and tasks that help to better assimilate the material. This makes the book not just a theoretical work, but a real practical guide. The author's style is distinguished by clarity and accessibility of presentation, which makes complex scientific concepts understandable even for those who are just starting their way in the study of hydrooptics. Viktor Aleksandrovich Yakovlev is a well-known scientist whose work in the field of optics and physics has been recognized both in Russia and abroad. His other well-known works are also devoted to various aspects of optics and physics, and they may be of interest to those who want to deepen their knowledge in these areas. “Direct and Reverse Problems in Hydrooptics” is not just a book, but a whole world in which the author invites the reader. It is full of intriguing ideas and fresh views on familiar things. Anyone interested in how light interacts with water will find something new and useful here. In addition, the book can be an excellent addition to the library of any researcher or student seeking a deep understanding of his specialty. If you are looking for literature on hydrooptics, physics or engineering, then this publication will be a real find for you. It will not only expand your knowledge, but also inspire further research and experimentation. In a world where technology and science are rapidly developing, understanding the basics of hydro-optics is becoming increasingly relevant, and Yakovlev’s book will help you be one step ahead.