The book "Cholera and the Water Supply in South London in 1854" was written by John Snow, a well-known English physician and public health expert. In this work, the author examines the historical events and diagnostic methods that led to the understanding of the connection between the water supply and the spread of the cholera epidemic in London at the beginning of the 19th century. Snow details the importance of hygienic conditions and the proper provision of clean water to prevent the emergence of diseases among the inhabitants of the metropolis, which became known as the first example of epidemiology. This book is an important source for understanding the history of medicine and water supply in Great Britain.