The book is dedicated to the greatest scientist and practitioner who created domestic engineering geology, made a significant contribution to the development of hydrogeology, the first academician in this field of geological knowledge. The book is an attempt to understand what was done by F.P. Savarensky for the development of domestic engineering geology and hydrogeology. The authors studied and analyzed published works, archival materials, letters and diaries, which made it possible to shed new light on the personality and scientific work of this remarkable scientist. A similar book about the life and work of F.P. Savarensky is published for the first time. Designed for a wide range of readers.