Water wealth of the earth in the service of socialist construction : The First All-Union Hydrogeological Congress, Leningrad is a unique document that reveals to the reader the richness of groundwater and its importance for the development of the Soviet state in the era of active industrial and social progress. This book, written by the author, whose name remains unknown, is the most important historical and scientific publication, which combines analytical materials, reports and speeches of the participants of the First All-Union Hydrogeological Congress held in Leningrad. What is hidden behind this name? The focus is on inexhaustible groundwater resources, their role in providing agriculture, industry, utilities and energy . The author masterfully shows how the wealth of the earth becomes a powerful tool in the hands of socialist construction, helping to overcome natural restrictions and creating conditions for the sustainable development of the country. The book deals in detail with the issues of exploration, protection and rational use of water resources, as well as new methods and technologies introduced into Soviet hydrogeology. This book will be of particular interest to those who are interested in the history of science, the development of hydrogeology and the resource base of the USSR. It will be valuable for specialists in the field of geology, water engineers, ecologists and students of specialized universities, as well as for anyone interested in the history of Soviet scientific progress and the role of natural resources in the construction of a socialist society. For readers looking for inspiration in examples of scientific achievements and practical solutions, the book will open a unique perspective on the development of hydrogeological research in the Soviet era. The topics raised in this paper go beyond the purely scientific aspects. It addresses the issues of natural resource management, environmental protection, as well as strategic planning in the field of water resources. The author emphasizes the importance of scientific research to improve water efficiency and ensure sustainable development of the country. A special place is occupied by the coverage of the role of hydrogeology in socialist construction, which makes the book not only a scientific work, but also a kind of manifesto of an era when science and industry went hand in hand. The author's style is distinguished by clarity, richness of facts and analytical calculations, which makes the book available both for specialists and for a wide range of readers interested in the history of science and the development of natural resources. Inspired by the spirit of Soviet progress, the author uses vivid examples illustrating the importance of groundwater for the country, and creates a vivid picture of scientific research of the time. The book “Water wealth of the earth in the service of socialist construction” is not just a collection of reports and articles, but a vivid testimony of the era when science served the ideals of socialism, and natural resources became the key to the prosperity and development of the country. It is perfect for those who appreciate historical research, scientific achievements and want to understand how in Soviet Russia they realized and used natural resources to build a brighter future. This book is a real storehouse of knowledge for those who seek inspiration in examples of scientific progress and believe in the power of environmental management.