The book “Spectral Sensitivity and BAC of the Solar Cell” by Ligachev and Popov is a fascinating and in-depth study that immerses the reader in the world of solar energy and semiconductor physics. This work will be of interest not only to specialists in the field of energy and physics, but also to everyone who is interested in modern technologies and their impact on the environment and sustainable development. The authors, Ligachev and Popov, are recognized experts in their field, and their work is based on many years of experience and research activities. The book offers readers a unique look at the spectral sensitivity of solar cells, as well as the volt-ampere characteristics (VAM), which play a key role in evaluating the efficiency of solar panels. Unlike many other publications, this book not only provides theoretical foundations, but also includes practical examples, making it particularly valuable for students, graduate students, and practitioners. From the first pages, the reader plunges into the world of physical phenomena that are behind the conversion of solar energy into electricity. The authors explain how different wavelengths of light affect the efficiency of solar cells, as well as how the structural and materialistic features of panels can change their performance. This information can be especially useful for engineers and developers working in the field of renewable energy sources. The book also raises important topics of sustainable development and ecology. With global warming and depletion of natural resources, solar energy is becoming increasingly relevant. Ligachev and Popov not only explore the technical aspects of solar cells, but also discuss their impact on the environment, which makes their work an important contribution to the discussion about the future of energy. Who is this book intended for? First of all, it will be of interest to students and graduate students of technical specialties, as well as researchers working in the field of solar energy . However, even those who are not specialists, but are interested in modern technologies and their impact on society, will find many useful and fascinating facts in the book. Readers seeking to understand how solar cells work and what factors influence their efficiency will be able to find answers to many of their questions here. The style of the authors is distinguished by clarity and accessibility, which makes it easy to assimilate complex concepts. Ligachev and Popov use many illustrations and graphs, which helps to visualize the material presented and makes it more understandable. This book will be a great addition to the library for anyone interested in science and technology, as well as striving to keep abreast of the latest developments in renewable energy. If you are looking for literature that combines scientific rigor and practical utility, “Spectral Sensitivity and Solar Cell BAC” will be a real find for you. In it you will find not only theoretical knowledge, but also practical recommendations that will help you better understand and use solar energy in various areas of life. This book inspires new ideas and projects, making it worthy of the attention of anyone interested in the future of energy and ecology.