The book "Underground hydrogasodynamics" by A. P. Telkova is a unique and in-depth study that immerses the reader in the world of groundwater and gases, their interactions and dynamics. This work will become an indispensable source of knowledge for specialists in geology, hydrogeology, ecology and engineering, as well as for undergraduate and postgraduate students seeking to expand their horizons in this complex and multifaceted field. In Underground Hydrogasodynamics, Telkov offers readers not only theoretical calculations, but also practical examples that illustrate the basic concepts and methods of studying groundwater and gases. The author carefully analyzes the processes taking place in the bowels of the Earth, and their impact on the environment. It considers important aspects such as groundwater migration, the interaction of water and gases, and the impact of these processes on ecosystems and human activities. The book will be of interest not only to professional geologists and engineers, but also to those who are simply passionate about nature and want to understand how our planet functions. It is suitable for readers aged 18 years and older, including students, graduate students and practitioners who are looking for advanced knowledge in the field of hydrogasodynamics. If you are interested in the topics of ecology, sustainable development and resource management, this work will be a real find for you. One of the key topics raised in the book is the impact of underground processes on climate change and ecosystems. Telkov not only describes the mechanisms of interaction between groundwater and gases, but also focuses on the importance of studying them to prevent environmental disasters. He emphasizes that understanding these processes can help in developing effective natural resource management strategies and in achieving sustainable development. Writing style A. P. Telkova is distinguished by clarity and accessibility, which makes complex scientific concepts understandable to a wide audience. It uses many illustrations, graphs, and tables to help visualize the material presented. This makes the book not only informative, but also convenient for perception. Telkov is also known for his other work in the field of geology and ecology, which confirms his status as an expert in this field. If you are looking for literature that combines scientific rigor and practical applicability, “Underground Hydrogasodynamics” is exactly what you need. This book will be your reliable companion in the study of underground processes, their dynamics and environmental impact. It will inspire you to new research and help you better understand how our planet functions, as well as how we can take care of its resources. Do not miss the opportunity to immerse yourself in the fascinating world of underground hydrogasodynamics with A. P. Telkov . This book is not just a textbook, but a real encyclopedia of knowledge that will open up new horizons for you and allow you to look at familiar things from a completely different angle.