The book "Speleofauna of the winged western spurs of the Eastern Sayan and the eastern slopes of the Kuznetsk Alatau", written by a team of authors under the direction of N. A. Efanova, is a unique study dedicated to one of the most mysterious and little-studied groups of animals - bats. This work not only deepens our knowledge of the biology and ecology of bats, but also opens up new horizons in the field of speleology and nature conservation. The book discusses the features of speleofauna of bats that live in specific conditions of mountain regions of Siberia. The study covers not only the systematics and diversity of species, but also their behavioral characteristics, ecosystem roles, and adaptations to habitat. The reader will be able to learn about what factors influence the distribution of these animals, how they interact with other cave dwellers, and what role they play in maintaining ecosystem balance. This work will be of particular interest to students and professionals in the fields of biology, ecology, zoology and environmental protection. The book will also attract the attention of nature lovers and everyone who is interested in the mysterious world of caves and their inhabitants. The age category of readers varies from high school students to professionals working in the field of biological sciences. Nevertheless, thanks to the accessible language of presentation and fascinating facts, the book will be interesting to a wide audience, which does not have special training. The topics raised in the book go beyond the mere description of species. The authors highlight the importance of conserving biodiversity and ecosystems inhabited by bats. In the context of global climate change and anthropogenic impact on nature, the work becomes especially relevant. It emphasizes the need for an integrated approach to nature conservation, including the study and protection of unique ecosystems, such as caves, which are home to many endangered species. Style N. A. Efanova and her colleagues are distinguished by scientific rigor and attention to detail, which makes the book not only informative, but also fascinating. The authors use a wealth of illustrative material, including photographs and diagrams, that help to better understand the processes and phenomena described. This allows the reader not only to absorb information, but also to perceive it visually, which makes reading more interactive and memorable. The book “Speleofauna of the winged western spurs of the Eastern Sayan and the eastern slopes of the Kuznetsk Alatau” will become a valuable source of knowledge for all who are interested in biology and ecosystems. It can become a basis for further research, as well as serve as a practical guide for environmentalists and conservationists. It contains ideas that can inspire active actions to protect unique natural complexes and their inhabitants. If you are looking for literature that combines a scientific approach and a fascinating narrative, then this book is exactly what you need. Not only will it broaden your horizons in biology, but it will also help you better understand the importance of preserving nature and its diversity. Do not miss the opportunity to plunge into the world of bats and discover the secrets that are stored in the bowels of our planet.