"Yeast" is a popular science book by the famous British biologist Thomas Henry Huxley, which explores the role of yeast in nature and its great importance for science, industry and humanity as a whole. In this work, the author describes the structure and functions of yeast, their influence on biological processes, in particular fermentation and putrefaction. Huxley reveals a wide range of applications of yeast in medicine, food industry and other fields, emphasizing their importance for human life. This book will be a fascinating source of knowledge about the study of microorganisms and their impact on the environment."